Let’s solve each problem one by one, step by step.
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Problem 1:
Keith bakes 12 pies a day for 5 days →
That’s 12 × 5 =
60 pies
Then he bakes 11 pies a day for the next 7 days →
That’s 11 × 7 =
77 pies
Total pies = 60 + 77 =
137 pies
✔ Checked: 12×5=60, 11×7=77, 60+77=137 — correct.
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Problem 2:
Johnny’s fence is 48 meters long. He wants to divide it into 4 even parts.
So we do: 48 ÷ 4 =
12 meters per part
✔ Checked: 12 × 4 = 48 — correct.
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Problem 3:
Terry’s house has 4 storeys. Each section (storey) is 3.5 meters high.
Total height = 4 × 3.5
Let’s calculate:
4 × 3 = 12
4 × 0.5 = 2
So 12 + 2 =
14 meters
✔ Checked: 3.5 + 3.5 + 3.5 + 3.5 = 14 — correct.
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Problem 4:
Amber drives 9 km to work and 9 km home every workday →
That’s 9 + 9 =
18 km per day
She works Monday to Friday → that’s
5 days per week
So in one week: 18 × 5 =
90 km
She does this for 7 weeks → 90 × 7 = ?
Let’s break it down:
90 × 7 = (9 × 7) × 10 = 63 × 10 =
630 km
✔ Checked: 18×5=90, 90×7=630 — correct.
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Final Answer:
1. 137
2. 12
3. 14
4. 630
Parent Tip: Review the logic above to help your child master the concept of addition and subtraction word problems worksheet 4th grade.