Let’s solve each problem step by step using the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).
---
Problem 1:
8 + 9 ÷ 3
→ First divide: 9 ÷ 3 = 3
→ Then add: 8 + 3 =
11
Problem 2:
20 + 4 × 10
→ First multiply: 4 × 10 = 40
→ Then add: 20 + 40 =
60
Problem 3:
40 ÷ 4 ÷ 2
→ Left to right division: 40 ÷ 4 = 10 → then 10 ÷ 2 =
5
Problem 4:
17 × 2 × 2
→ Left to right multiplication: 17 × 2 = 34 → then 34 × 2 =
68
Problem 5:
72 ÷ 12 × 4
→ Left to right: 72 ÷ 12 = 6 → then 6 × 4 =
24
Problem 6:
2 × 5 × 10
→ Left to right: 2 × 5 = 10 → then 10 × 10 =
100
Problem 7:
90 ÷ 2 × 9
→ Left to right: 90 ÷ 2 = 45 → then 45 × 9 =
405
Problem 8:
8 × 10 × 5
→ Left to right: 8 × 10 = 80 → then 80 × 5 =
400
Problem 9:
100 ÷ 4 × 7
→ Left to right: 100 ÷ 4 = 25 → then 25 × 7 =
175
Problem 10:
42 + 12 ÷ 2
→ First divide: 12 ÷ 2 = 6
→ Then add: 42 + 6 =
48
---
Final Answer:
1. 11
2. 60
3. 5
4. 68
5. 24
6. 100
7. 405
8. 400
9. 175
10. 48
Parent Tip: Review the logic above to help your child master the concept of order of operations pemdas practice worksheet answer key.
