Let's solve the multiplication problems in the worksheet step by step. The task is to
multiply whole tens, which means we are multiplying numbers where one or both of the numbers end in zero (like 10, 20, 50, etc.).
The key strategy for multiplying whole tens is:
- First, multiply the non-zero digits.
- Then, add the zeros from the original numbers to the result.
For example:
4 × 50
Step 1: 4 × 5 = 20
Step 2: Add one zero (from 50) → 200
So,
4 × 50 = 200
Let’s go through all the problems:
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Solutions:
1.
4 × 50 = 4 × 5 = 20 → add one zero →
200
2.
7 × 50 = 7 × 5 = 35 → add one zero →
350
3.
3 × 80 = 3 × 8 = 24 → add one zero →
240
4.
4 × 20 = 4 × 2 = 8 → add one zero →
80
5.
7 × 80 = 7 × 8 = 56 → add one zero →
560
6.
5 × 70 = 5 × 7 = 35 → add one zero →
350
7.
5 × 10 = 5 × 1 = 5 → add one zero →
50
8.
6 × 50 = 6 × 5 = 30 → add one zero →
300
9.
5 × 90 = 5 × 9 = 45 → add one zero →
450
10.
9 × 90 = 9 × 9 = 81 → add one zero →
810
11.
2 × 90 = 2 × 9 = 18 → add one zero →
180
12.
2 × 60 = 2 × 6 = 12 → add one zero →
120
13.
2 × 50 = 2 × 5 = 10 → add one zero →
100
14.
8 × 70 = 8 × 7 = 56 → add one zero →
560
15.
4 × 10 = 4 × 1 = 4 → add one zero →
40
16.
6 × 60 = 6 × 6 = 36 → add one zero →
360
17.
7 × 20 = 7 × 2 = 14 → add one zero →
140
18.
5 × 80 = 5 × 8 = 40 → add one zero →
400
19.
1 × 70 = 1 × 7 = 7 → add one zero →
70
20.
5 × 40 = 5 × 4 = 20 → add one zero →
200
21.
9 × 40 = 9 × 4 = 36 → add one zero →
360
22.
7 × 10 = 7 × 1 = 7 → add one zero →
70
23.
3 × 10 = 3 × 1 = 3 → add one zero →
30
24.
6 × 90 = 6 × 9 = 54 → add one zero →
540
25.
8 × 20 = 8 × 2 = 16 → add one zero →
160
26.
4 × 40 = 4 × 4 = 16 → add one zero →
160
27.
4 × 70 = 4 × 7 = 28 → add one zero →
280
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✔ Final Answers:
1. 200
2. 350
3. 240
4. 80
5. 560
6. 350
7. 50
8. 300
9. 450
10. 810
11. 180
12. 120
13. 100
14. 560
15. 40
16. 360
17. 140
18. 400
19. 70
20. 200
21. 360
22. 70
23. 30
24. 540
25. 160
26. 160
27. 280
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🔍 Explanation:
This worksheet helps students practice multiplying single-digit numbers by multiples of ten. The pattern is simple:
- Multiply the digits (ignoring the zero).
- Count the number of zeros in the multiplier and add them to the result.
This builds foundational skills for understanding place value and mental math.
Let me know if you'd like a printable version or a visual explanation!
Parent Tip: Review the logic above to help your child master the concept of 3rd grade math test.