Let’s solve each problem step by step using the order of operations:
BIMDAS — Brackets, Indices, Multiplication/Division (left to right), Addition/Subtraction (left to right).
We’ll go one by one.
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1. 20 + 8 × 4
→ First, do multiplication: 8 × 4 = 32
→ Then add: 20 + 32 =
52
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2. 7 × 6 + 4 × 4
→ Do both multiplications first:
7 × 6 = 42
4 × 4 = 16
→ Then add: 42 + 16 =
58
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3. 42 ÷ 7 + 8 × 8
→ Division and multiplication first:
42 ÷ 7 = 6
8 × 8 = 64
→ Then add: 6 + 64 =
70
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4. 15 + 9 × 5 + 15
→ Multiply first: 9 × 5 = 45
→ Now add left to right:
15 + 45 = 60
60 + 15 =
75
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5. 7 × 7 + 4 × 3
→ Multiplications first:
7 × 7 = 49
4 × 3 = 12
→ Add: 49 + 12 =
61
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6. 36 ÷ 6 × 5
→ Division and multiplication from left to right:
36 ÷ 6 = 6
6 × 5 =
30
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7. 82 - 9 × 9 + 20
→ Multiply first: 9 × 9 = 81
→ Now do subtraction and addition left to right:
82 - 81 = 1
1 + 20 =
21
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8. 4 × 12 + 3 × 4
→ Multiplications first:
4 × 12 = 48
3 × 4 = 12
→ Add: 48 + 12 =
60
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9. 6 × 12 + 3 × 3
→ Multiplications first:
6 × 12 = 72
3 × 3 = 9
→ Add: 72 + 9 =
81
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10. 12 + 12 × 12
→ Multiply first: 12 × 12 = 144
→ Then add: 12 + 144 =
156
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Final Answer:
1. 52
2. 58
3. 70
4. 75
5. 61
6. 30
7. 21
8. 60
9. 81
10. 156
Parent Tip: Review the logic above to help your child master the concept of number operations worksheet.
