Let's solve each problem step by step. These are all addition and subtraction problems involving multiples of 10.
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1. 70 + \_\_\_\_ = 110
To find the missing number, subtract 70 from 110:
110 - 70 = 40
✔ Answer:
40
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2. 60 + \_\_\_\_ = 130
Subtract 60 from 130:
130 - 60 = 70
✔ Answer:
70
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3. \_\_\_\_ - 20 = 90
To find the missing number, add 20 to 90:
90 + 20 = 110
✔ Answer:
110
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4. \_\_\_\_ - 50 = 80
Add 50 to 80:
80 + 50 = 130
✔ Answer:
130
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5. 40 + \_\_\_\_ = 120
Subtract 40 from 120:
120 - 40 = 80
✔ Answer:
80
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6. 70 + \_\_\_\_ = 150
Subtract 70 from 150:
150 - 70 = 80
✔ Answer:
80
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7. \_\_\_\_ - 40 = 80
Add 40 to 80:
80 + 40 = 120
✔ Answer:
120
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8. \_\_\_\_ - 70 = 60
Add 70 to 60:
60 + 70 = 130
✔ Answer:
130
---
9. 130 - \_\_\_\_ = 80
Subtract 80 from 130:
130 - 80 = 50
✔ Answer:
50
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10. 140 - \_\_\_\_ = 60
Subtract 60 from 140:
140 - 60 = 80
✔ Answer:
80
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✔ Final Answers:
1.
40
2.
70
3.
110
4.
130
5.
80
6.
80
7.
120
8.
130
9.
50
10.
80
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🔍 Explanation:
These problems involve basic arithmetic with multiples of 10. The key is to isolate the unknown by using inverse operations:
- For
addition: subtract the known number from the total.
- For
subtraction: add the subtracted number to the result.
Since all numbers are multiples of 10, it's easier to calculate mentally or by counting in tens.
Let me know if you'd like a printable version or explanation for kids! 😊
Parent Tip: Review the logic above to help your child master the concept of subtracting multiples of 10 worksheet.
