Wallpaper worksheet

1. Rolls to buy: 10 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(14-2.1\right)\times 100$$=\mathrm{1,190}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,190}}{40}$$=29.75$$=30\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.6\times 100+9$$=269\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $8\text{repeats}\times 34$$=272\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{9\times 100}{272}$$=3.308824$$=3\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{30}{3}$$=10$$=10\text{rolls}$

2. Rolls to buy: 14 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(15-1.4\right)\times 100$$=\mathrm{1,360}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,360}}{52}$$=26.153846$$=27\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $3\times 100+12$$=312\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 54$$=324\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{8\times 100}{324}$$=2.469136$$=2\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{27}{2}$$=13.5$$=14\text{rolls}$

3. Rolls to buy: 16 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(21-2.3\right)\times 100$$=\mathrm{1,870}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,870}}{60}$$=31.166667$$=32\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.2\times 100+11$$=231\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 45$$=270\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{7.25\times 100}{270}$$=2.685185$$=2\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{32}{2}$$=16$$=16\text{rolls}$

4. Rolls to buy: 10 rolls

1. Take the doors and openings off the wall width, since they get no paper (in in)

   $\left(48-4\right)\times 12$$=528\text{\hspace{0.17em}in}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{528}{18}$$=29.333333$$=30\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $8\times 12+4$$=100\text{\hspace{0.17em}in}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $5\text{repeats}\times 20$$=100\text{\hspace{0.17em}in}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{30\times 12}{100}$$=3.6$$=3\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{30}{3}$$=10$$=10\text{rolls}$

5. Rolls to buy: 6 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(13-1.6\right)\times 100$$=\mathrm{1,140}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,140}}{65}$$=17.538462$$=18\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.2\times 100+7$$=227\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 45$$=270\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{9.5\times 100}{270}$$=3.518519$$=3\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{18}{3}$$=6$$=6\text{rolls}$

6. Rolls to buy: 9 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(11-1.6\right)\times 100$$=940\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{940}{56}$$=16.785714$$=17\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.8\times 100+8$$=288\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 54$$=324\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{9.5\times 100}{324}$$=2.932099$$=2\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{17}{2}$$=8.5$$=9\text{rolls}$

7. Rolls to buy: 18 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(13-1.8\right)\times 100$$=\mathrm{1,120}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,120}}{32}$$=35$$=35\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.6\times 100+8$$=268\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 45$$=270\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{8\times 100}{270}$$=2.962963$$=2\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{35}{2}$$=17.5$$=18\text{rolls}$

8. Rolls to buy: 27 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(15-1.4\right)\times 100$$=\mathrm{1,360}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,360}}{51}$$=26.666667$$=27\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2.8\times 100+11$$=291\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 55$$=330\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{6.5\times 100}{330}$$=1.969697$$=1\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{27}{1}$$=27$$=27\text{rolls}$

9. Rolls to buy: 6 rolls

1. Take the doors and openings off the wall width, since they get no paper (in in)

   $\left(56-5\right)\times 12$$=612\text{\hspace{0.17em}in}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{612}{26}$$=23.538462$$=24\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $6\times 12+4$$=76\text{\hspace{0.17em}in}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 15$$=90\text{\hspace{0.17em}in}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{32\times 12}{90}$$=4.266667$$=4\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{24}{4}$$=6$$=6\text{rolls}$

10. Rolls to buy: 10 rolls

1. Take the doors and openings off the wall width, since they get no paper (in cm)

   $\left(16-1.6\right)\times 100$$=\mathrm{1,440}\text{\hspace{0.17em}cm}$

2. Divide by the roll width to count strips, rounding up because a part strip still needs a full one

   $\frac{\mathrm{1,440}}{48}$$=30$$=30\text{strips}$

3. Add the trimming allowance to the wall height, so each strip can be trimmed neatly

   $2\times 100+11$$=211\text{\hspace{0.17em}cm}$

4. Round the strip up to a whole number of pattern repeats so the design lines up

   $6\text{repeats}\times 40$$=240\text{\hspace{0.17em}cm}$

5. Divide the roll length by the cut length, rounding down because a short leftover can't make a strip

   $\frac{8\times 100}{240}$$=3.333333$$=3\text{per roll}$

6. Divide the strips by strips per roll, rounding up because you can only buy whole rolls

   $\frac{30}{3}$$=10$$=10\text{rolls}$