Let's solve each problem one by one and explain the reasoning.
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1. FOOTBALL
Problem: A team gained 5 yards on their first play of the game. Then they lost 6 yards. Find the total change in yardage.
Solution:
- Gained 5 yards → +5
- Lost 6 yards → −6
- Total change = 5 + (−6) =
−1 yard
✔ Answer: The total change in yardage is
−1 yard (a net loss of 1 yard).
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2. CHECKING
Problem: Your checking account is overdrawn by $50. You write a check for $20. What is the balance in your account?
Solution:
- Overdrawn by $50 means the balance is
−$50
- Writing a check for $20 means you subtract another $20:
−50 − 20 =
−$70
✔ Answer: The new balance is
−$70 (still overdrawn by $70).
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3. TEMPERATURE
Problem: The average temperature in Calgary, Canada, is 22°C in July and −11°C in January. Find the range of the highest and lowest temperatures.
Solution:
- Range = Highest temperature − Lowest temperature
= 22°C − (−11°C) = 22 + 11 =
33°C
✔ Answer: The temperature range is
33°C.
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4. ROLLER COASTER
Problem: A roller coaster begins at 90 feet above ground level. Then it descends 105 feet. Find the height of the coaster after the first descent.
Solution:
- Start: 90 feet
- Descend 105 feet → subtract 105
90 − 105 =
−15 feet
Negative height means it’s
15 feet below ground level.
✔ Answer: The height is
−15 feet (15 feet below ground).
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5. SAVINGS
Problem: Sonia has $235 in her savings account. She withdraws $45. What is left in her savings account?
Solution:
- Initial amount: $235
- Withdraw $45 → subtract 45
235 − 45 =
$190
✔ Answer: $190 is left in her savings account.
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6. BEACH
Problem: Wai and Kuri were digging in the sand at the beach. Wai dug a hole that was 15 inches below the surface and Kuri dug a hole that was 9 inches below the surface. Find the difference in the depths of their holes.
Solution:
- Wai’s depth: −15 inches (below surface)
- Kuri’s depth: −9 inches
- Difference = |−15| − |−9| = 15 − 9 =
6 inches
Alternatively:
Difference = −9 − (−15) = −9 + 15 = 6 inches
✔ Answer: The difference in depth is
6 inches.
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✔ Final Answers:
1.
−1 yard
2.
−$70
3.
33°C
4.
−15 feet
5.
$190
6.
6 inches
Let me know if you'd like these explained in a simpler way or visualized!
Parent Tip: Review the logic above to help your child master the concept of integer word problems worksheet.