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Caffeine Intake worksheet

Grade 4 · CCSS 4.OA.A.3

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

1.
Problem 1.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 200 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 80 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 30 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 56 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 170 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 450 mg
Find: Total caffeine
Answer
2.
Problem 2.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 140 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 58 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 36 mg
- Caffeinated soft drink (12 fl oz): servings: 2
- Caffeinated soft drink (12 fl oz): caffeine per serving: 61 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 180 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 450 mg
Find: Total caffeine
Answer
3.
Problem 3.
- Brewed coffee (12 fl oz): servings: 2
- Brewed coffee (12 fl oz): caffeine per serving: 145 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 77 mg
- Green tea (12 fl oz): servings: 2
- Green tea (12 fl oz): caffeine per serving: 37 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 36 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 130 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 375 mg
Find: Total caffeine
Answer
4.
Problem 4.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 180 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 65 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 32 mg
- Caffeinated soft drink (12 fl oz): servings: 2
- Caffeinated soft drink (12 fl oz): caffeine per serving: 54 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 110 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 390 mg
Find: Total caffeine
Answer
5.
Problem 5.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 160 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 74 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 30 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 50 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 140 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 300 mg
Find: Total caffeine
Answer
6.
Problem 6.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 200 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 58 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 45 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 56 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 160 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 310 mg
Find: Total caffeine
Answer
7.
Problem 7.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 120 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 90 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 36 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 40 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 180 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 360 mg
Find: Total caffeine
Answer
8.
Problem 8.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 180 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 90 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 40 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 50 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 160 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 300 mg
Find: Total caffeine
Answer
9.
Problem 9.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 180 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 90 mg
- Green tea (12 fl oz): servings: 1
- Green tea (12 fl oz): caffeine per serving: 50 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 54 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 160 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 335 mg
Find: Total caffeine
Answer
10.
Problem 10.
- Brewed coffee (12 fl oz): servings: 1
- Brewed coffee (12 fl oz): caffeine per serving: 180 mg
- Black tea (12 fl oz): servings: 0
- Black tea (12 fl oz): caffeine per serving: 64 mg
- Green tea (12 fl oz): servings: 2
- Green tea (12 fl oz): caffeine per serving: 36 mg
- Caffeinated soft drink (12 fl oz): servings: 1
- Caffeinated soft drink (12 fl oz): caffeine per serving: 40 mg
- Energy drink (12 fl oz): servings: 0
- Energy drink (12 fl oz): caffeine per serving: 160 mg
- Other source: servings: 0
- Other source: caffeine per serving: 0 mg
- Daily limit to compare with: 500 mg
Find: Total caffeine
Answer

Answer key: Caffeine Intake worksheet

1. Total caffeine: 286 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 200 mg$ $= 200 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 30 mg$ $= 30 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 56 mg$ $= 56 mg$
4. Add up the caffeine from every drink
  $200 + 30 + 56$ $= 286 mg$
5. Take the total away from your daily limit to see how much room is left
  $450 mg - 286 mg$ $= 164 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{286}{450} \times 100$ $= 63.6%$
2. Total caffeine: 298 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 140 mg$ $= 140 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 36 mg$ $= 36 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $2 \times 61 mg$ $= 122 mg$
4. Add up the caffeine from every drink
  $140 + 36 + 122$ $= 298 mg$
5. Take the total away from your daily limit to see how much room is left
  $450 mg - 298 mg$ $= 152 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{298}{450} \times 100$ $= 66.2%$
3. Total caffeine: 400 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $2 \times 145 mg$ $= 290 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $2 \times 37 mg$ $= 74 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 36 mg$ $= 36 mg$
4. Add up the caffeine from every drink
  $290 + 74 + 36$ $= 400 mg$
5. Take the total away from your daily limit to see how much room is left
  $375 mg - 400 mg$ $= −25 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{400}{375} \times 100$ $= 106.7%$
4. Total caffeine: 320 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 180 mg$ $= 180 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 32 mg$ $= 32 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $2 \times 54 mg$ $= 108 mg$
4. Add up the caffeine from every drink
  $180 + 32 + 108$ $= 320 mg$
5. Take the total away from your daily limit to see how much room is left
  $390 mg - 320 mg$ $= 70 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{320}{390} \times 100$ $= 82.1%$
5. Total caffeine: 240 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 160 mg$ $= 160 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 30 mg$ $= 30 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 50 mg$ $= 50 mg$
4. Add up the caffeine from every drink
  $160 + 30 + 50$ $= 240 mg$
5. Take the total away from your daily limit to see how much room is left
  $300 mg - 240 mg$ $= 60 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{240}{300} \times 100$ $= 80%$
6. Total caffeine: 301 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 200 mg$ $= 200 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 45 mg$ $= 45 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 56 mg$ $= 56 mg$
4. Add up the caffeine from every drink
  $200 + 45 + 56$ $= 301 mg$
5. Take the total away from your daily limit to see how much room is left
  $310 mg - 301 mg$ $= 9 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{301}{310} \times 100$ $= 97.1%$
7. Total caffeine: 196 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 120 mg$ $= 120 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 36 mg$ $= 36 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 40 mg$ $= 40 mg$
4. Add up the caffeine from every drink
  $120 + 36 + 40$ $= 196 mg$
5. Take the total away from your daily limit to see how much room is left
  $360 mg - 196 mg$ $= 164 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{196}{360} \times 100$ $= 54.4%$
8. Total caffeine: 270 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 180 mg$ $= 180 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 40 mg$ $= 40 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 50 mg$ $= 50 mg$
4. Add up the caffeine from every drink
  $180 + 40 + 50$ $= 270 mg$
5. Take the total away from your daily limit to see how much room is left
  $300 mg - 270 mg$ $= 30 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{270}{300} \times 100$ $= 90%$
9. Total caffeine: 284 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 180 mg$ $= 180 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 50 mg$ $= 50 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 54 mg$ $= 54 mg$
4. Add up the caffeine from every drink
  $180 + 50 + 54$ $= 284 mg$
5. Take the total away from your daily limit to see how much room is left
  $335 mg - 284 mg$ $= 51 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{284}{335} \times 100$ $= 84.8%$
10. Total caffeine: 292 mg
1. Brewed coffee (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 180 mg$ $= 180 mg$
2. Green tea (12 fl oz): multiply the servings by the caffeine in one serving
  $2 \times 36 mg$ $= 72 mg$
3. Caffeinated soft drink (12 fl oz): multiply the servings by the caffeine in one serving
  $1 \times 40 mg$ $= 40 mg$
4. Add up the caffeine from every drink
  $180 + 72 + 40$ $= 292 mg$
5. Take the total away from your daily limit to see how much room is left
  $500 mg - 292 mg$ $= 208 mg$
6. Divide by the limit and multiply by 100 to see what share of it you have used
  $\frac{292}{500} \times 100$ $= 58.4%$