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House Apportionment worksheet

Grades 8–9 · CCSS 8.NS.A.2

Solve each problem and show your work. Round answers to 2 decimal places where needed.

  1. Problem 1.
    • States and populations: Northmere 5286610 Eastbrook 16346 Lakeland 1692916 Southvale 1790693 Westridge 1268789 Highfield 196155
    • House size (total seats): 20
    • Minimum seats per state: 1

    Find: Seats per state

  2. Problem 2.
    • States and populations: Northmere 3589724 Eastbrook 5943968 Lakeland 1461257 Southvale 892176 Westridge 182034 Highfield 281734
    • House size (total seats): 12
    • Minimum seats per state: 1

    Find: Seats per state

  3. Problem 3.
    • States and populations: Northmere 4123777 Eastbrook 402529 Lakeland 1266586 Southvale 1400187 Westridge 374542 Highfield 133192
    • House size (total seats): 10
    • Minimum seats per state: 1

    Find: Seats per state

  4. Problem 4.
    • States and populations: Northmere 4977279 Eastbrook 4772059 Lakeland 946427 Southvale 375040 Westridge 862295 Highfield 381057
    • House size (total seats): 20
    • Minimum seats per state: 1

    Find: Seats per state

  5. Problem 5.
    • States and populations: Northmere 6078022 Eastbrook 2713418 Lakeland 2472752 Southvale 1815304 Westridge 313580 Highfield 528236
    • House size (total seats): 10
    • Minimum seats per state: 1

    Find: Seats per state

  6. Problem 6.
    • States and populations: Northmere 3483499 Eastbrook 1489021 Lakeland 488149 Southvale 1325345 Westridge 755135 Highfield 88768
    • House size (total seats): 12
    • Minimum seats per state: 1

    Find: Seats per state

  7. Problem 7.
    • States and populations: Northmere 5245689 Eastbrook 5172902 Lakeland 765481 Southvale 1805891 Westridge 941138 Highfield 280724
    • House size (total seats): 12
    • Minimum seats per state: 1

    Find: Seats per state

  8. Problem 8.
    • States and populations: Northmere 8031255 Eastbrook 5516812 Lakeland 2223459 Southvale 1677221 Westridge 1093277 Highfield 651633
    • House size (total seats): 10
    • Minimum seats per state: 1

    Find: Seats per state

  9. Problem 9.
    • States and populations: Northmere 7323546 Eastbrook 1759465 Lakeland 2828420 Southvale 931000 Westridge 1226228 Highfield 491528
    • House size (total seats): 10
    • Minimum seats per state: 1

    Find: Seats per state

  10. Problem 10.
    • States and populations: Northmere 7999638 Eastbrook 788213 Lakeland 3138652 Southvale 297545 Westridge 508832 Highfield 82060
    • House size (total seats): 15
    • Minimum seats per state: 1

    Find: Seats per state

Answer key: House Apportionment worksheet

  1. 1. Seats per state: Northmere 10, Eastbrook 1, Lakeland 3, Southvale 3, Westridge 2, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 14 of the 20 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 16 goes to Southvale, its 3rd. With 2 seats, its priority value is the highest left.

      1,790,6932×3=731,047.36
    4. Seat 17 goes to Northmere, its 8th. With 7 seats, its priority value is the highest left.

      5,286,6107×8=706,452.98
    5. Seat 18 goes to Lakeland, its 3rd. With 2 seats, its priority value is the highest left.

      1,692,9162×3=691,130.06
    6. Seat 19 goes to Northmere, its 9th. With 8 seats, its priority value is the highest left.

      5,286,6108×9=623,032.96
    7. Seat 20 goes to Northmere, its 10th. With 9 seats, its priority value is the highest left.

      5,286,6109×10=557,257.62
    8. Next in line: if the House had 21 seats, the extra seat would go to Westridge, whose priority value is now the highest.

      1,268,7892×3=517,980.94
    9. The final seats per state.

      Northmere 10, Eastbrook 1, Lakeland 3, Southvale 3, Westridge 2, Highfield 1
  2. 2. Seats per state: Northmere 3, Eastbrook 5, Lakeland 1, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 6 of the 12 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 8 goes to Northmere, its 2nd. With 1 seat, its priority value is the highest left.

      3,589,7241×2=2,538,318.18
    4. Seat 9 goes to Eastbrook, its 3rd. With 2 seats, its priority value is the highest left.

      5,943,9682×3=2,426,614.77
    5. Seat 10 goes to Eastbrook, its 4th. With 3 seats, its priority value is the highest left.

      5,943,9683×4=1,715,875.76
    6. Seat 11 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      3,589,7242×3=1,465,498.69
    7. Seat 12 goes to Eastbrook, its 5th. With 4 seats, its priority value is the highest left.

      5,943,9684×5=1,329,111.65
    8. Next in line: if the House had 13 seats, the extra seat would go to Eastbrook, whose priority value is now the highest.

      5,943,9685×6=1,085,215.12
    9. The final seats per state.

      Northmere 3, Eastbrook 5, Lakeland 1, Southvale 1, Westridge 1, Highfield 1
  3. 3. Seats per state: Northmere 4, Eastbrook 1, Lakeland 1, Southvale 2, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 4 of the 10 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 7 goes to Northmere, its 2nd. With 1 seat, its priority value is the highest left.

      4,123,7771×2=2,915,950.68
    4. Seat 8 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      4,123,7772×3=1,683,524.91
    5. Seat 9 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      4,123,7773×4=1,190,431.88
    6. Seat 10 goes to Southvale, its 2nd. With 1 seat, its priority value is the highest left.

      1,400,1871×2=990,081.72
    7. Next in line: if the House had 11 seats, the extra seat would go to Northmere, whose priority value is now the highest.

      4,123,7774×5=922,104.57
    8. The final seats per state.

      Northmere 4, Eastbrook 1, Lakeland 1, Southvale 2, Westridge 1, Highfield 1
  4. 4. Seats per state: Northmere 8, Eastbrook 7, Lakeland 2, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 14 of the 20 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 16 goes to Eastbrook, its 6th. With 5 seats, its priority value is the highest left.

      4,772,0595×6=871,254.79
    4. Seat 17 goes to Northmere, its 7th. With 6 seats, its priority value is the highest left.

      4,977,2796×7=768,010.82
    5. Seat 18 goes to Eastbrook, its 7th. With 6 seats, its priority value is the highest left.

      4,772,0596×7=736,344.69
    6. Seat 19 goes to Lakeland, its 2nd. With 1 seat, its priority value is the highest left.

      946,4271×2=669,224.95
    7. Seat 20 goes to Northmere, its 8th. With 7 seats, its priority value is the highest left.

      4,977,2797×8=665,116.88
    8. Next in line: if the House had 21 seats, the extra seat would go to Eastbrook, whose priority value is now the highest.

      4,772,0597×8=637,693.21
    9. The final seats per state.

      Northmere 8, Eastbrook 7, Lakeland 2, Southvale 1, Westridge 1, Highfield 1
  5. 5. Seats per state: Northmere 4, Eastbrook 2, Lakeland 1, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 4 of the 10 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 7 goes to Northmere, its 2nd. With 1 seat, its priority value is the highest left.

      6,078,0221×2=4,297,810.57
    4. Seat 8 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      6,078,0222×3=2,481,342.09
    5. Seat 9 goes to Eastbrook, its 2nd. With 1 seat, its priority value is the highest left.

      2,713,4181×2=1,918,676.27
    6. Seat 10 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      6,078,0223×4=1,754,573.82
    7. Next in line: if the House had 11 seats, the extra seat would go to Lakeland, whose priority value is now the highest.

      2,472,7521×2=1,748,499.71
    8. The final seats per state.

      Northmere 4, Eastbrook 2, Lakeland 1, Southvale 1, Westridge 1, Highfield 1
  6. 6. Seats per state: Northmere 5, Eastbrook 2, Lakeland 1, Southvale 2, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 6 of the 12 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 8 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      3,483,4992×3=1,422,132.51
    4. Seat 9 goes to Eastbrook, its 2nd. With 1 seat, its priority value is the highest left.

      1,489,0211×2=1,052,896.85
    5. Seat 10 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      3,483,4993×4=1,005,599.54
    6. Seat 11 goes to Southvale, its 2nd. With 1 seat, its priority value is the highest left.

      1,325,3451×2=937,160.44
    7. Seat 12 goes to Northmere, its 5th. With 4 seats, its priority value is the highest left.

      3,483,4994×5=778,934.06
    8. Next in line: if the House had 13 seats, the extra seat would go to Northmere, whose priority value is now the highest.

      3,483,4995×6=635,996.99
    9. The final seats per state.

      Northmere 5, Eastbrook 2, Lakeland 1, Southvale 2, Westridge 1, Highfield 1
  7. 7. Seats per state: Northmere 4, Eastbrook 4, Lakeland 1, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 6 of the 12 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 8 goes to Eastbrook, its 2nd. With 1 seat, its priority value is the highest left.

      5,172,9021×2=3,657,794.08
    4. Seat 9 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      5,245,6892×3=2,141,543.57
    5. Seat 10 goes to Eastbrook, its 3rd. With 2 seats, its priority value is the highest left.

      5,172,9022×3=2,111,828.4
    6. Seat 11 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      5,245,6893×4=1,514,299.98
    7. Seat 12 goes to Eastbrook, its 4th. With 3 seats, its priority value is the highest left.

      5,172,9023×4=1,493,288.18
    8. Next in line: if the House had 13 seats, the extra seat would go to Southvale, whose priority value is now the highest.

      1,805,8911×2=1,276,957.77
    9. The final seats per state.

      Northmere 4, Eastbrook 4, Lakeland 1, Southvale 1, Westridge 1, Highfield 1
  8. 8. Seats per state: Northmere 4, Eastbrook 2, Lakeland 1, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 4 of the 10 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 7 goes to Northmere, its 2nd. With 1 seat, its priority value is the highest left.

      8,031,2551×2=5,678,954.87
    4. Seat 8 goes to Eastbrook, its 2nd. With 1 seat, its priority value is the highest left.

      5,516,8121×2=3,900,975.18
    5. Seat 9 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      8,031,2552×3=3,278,746.12
    6. Seat 10 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      8,031,2553×4=2,318,423.62
    7. Next in line: if the House had 11 seats, the extra seat would go to Eastbrook, whose priority value is now the highest.

      5,516,8122×3=2,252,229.07
    8. The final seats per state.

      Northmere 4, Eastbrook 2, Lakeland 1, Southvale 1, Westridge 1, Highfield 1
  9. 9. Seats per state: Northmere 4, Eastbrook 1, Lakeland 2, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 4 of the 10 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 7 goes to Northmere, its 2nd. With 1 seat, its priority value is the highest left.

      7,323,5461×2=5,178,529.04
    4. Seat 8 goes to Northmere, its 3rd. With 2 seats, its priority value is the highest left.

      7,323,5462×3=2,989,825.13
    5. Seat 9 goes to Northmere, its 4th. With 3 seats, its priority value is the highest left.

      7,323,5463×4=2,114,125.63
    6. Seat 10 goes to Lakeland, its 2nd. With 1 seat, its priority value is the highest left.

      2,828,4201×2=1,999,994.96
    7. Next in line: if the House had 11 seats, the extra seat would go to Northmere, whose priority value is now the highest.

      7,323,5464×5=1,637,594.67
    8. The final seats per state.

      Northmere 4, Eastbrook 1, Lakeland 2, Southvale 1, Westridge 1, Highfield 1
  10. 10. Seats per state: Northmere 8, Eastbrook 1, Lakeland 3, Southvale 1, Westridge 1, Highfield 1

    1. Give each of the 6 states its minimum of 1 seat. That leaves 9 of the 15 seats to give out by priority.

      6×1=6
    2. Give out the other seats one at a time, each to the state with the highest priority value. That value is the population (P) divided by the square root of n(n + 1), where n is the seats it has so far.

      priority=Pn×(n+1)
    3. Seat 11 goes to Northmere, its 5th. With 4 seats, its priority value is the highest left.

      7,999,6384×5=1,788,773.44
    4. Seat 12 goes to Northmere, its 6th. With 5 seats, its priority value is the highest left.

      7,999,6385×6=1,460,527.39
    5. Seat 13 goes to Lakeland, its 3rd. With 2 seats, its priority value is the highest left.

      3,138,6522×3=1,281,349.31
    6. Seat 14 goes to Northmere, its 7th. With 6 seats, its priority value is the highest left.

      7,999,6386×7=1,234,370.94
    7. Seat 15 goes to Northmere, its 8th. With 7 seats, its priority value is the highest left.

      7,999,6387×8=1,068,996.59
    8. Next in line: if the House had 16 seats, the extra seat would go to Northmere, whose priority value is now the highest.

      7,999,6388×9=942,766.38
    9. The final seats per state.

      Northmere 8, Eastbrook 1, Lakeland 3, Southvale 1, Westridge 1, Highfield 1