Let's solve the multiplication problems in the worksheet step by step. The task is to
multiply whole tens, which means multiplying a single-digit number by a multiple of 10 (like 10, 20, 30, etc.).
Key Concept:
When you multiply a number by a multiple of 10, you can:
1. Multiply the non-zero digits first.
2. Then add a zero at the end (since multiplying by 10 adds one zero).
For example:
4 × 50 = 4 × 5 × 10 = 20 × 10 =
200
Let’s go through each problem:
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Problems and Solutions:
1.
4 × 50 = 4 × 5 × 10 = 20 × 10 =
200
2.
7 × 50 = 7 × 5 × 10 = 35 × 10 =
350
3.
3 × 80 = 3 × 8 × 10 = 24 × 10 =
240
4.
4 × 20 = 4 × 2 × 10 = 8 × 10 =
80
5.
7 × 80 = 7 × 8 × 10 = 56 × 10 =
560
6.
5 × 70 = 5 × 7 × 10 = 35 × 10 =
350
7.
5 × 10 = 5 × 1 × 10 = 5 × 10 =
50
8.
6 × 50 = 6 × 5 × 10 = 30 × 10 =
300
9.
5 × 90 = 5 × 9 × 10 = 45 × 10 =
450
10.
9 × 90 = 9 × 9 × 10 = 81 × 10 =
810
11.
2 × 90 = 2 × 9 × 10 = 18 × 10 =
180
12.
2 × 60 = 2 × 6 × 10 = 12 × 10 =
120
13.
2 × 50 = 2 × 5 × 10 = 10 × 10 =
100
14.
8 × 70 = 8 × 7 × 10 = 56 × 10 =
560
15.
4 × 10 = 4 × 1 × 10 = 4 × 10 =
40
16.
6 × 60 = 6 × 6 × 10 = 36 × 10 =
360
17.
7 × 20 = 7 × 2 × 10 = 14 × 10 =
140
18.
5 × 80 = 5 × 8 × 10 = 40 × 10 =
400
19.
1 × 70 = 1 × 7 × 10 = 7 × 10 =
70
20.
5 × 40 = 5 × 4 × 10 = 20 × 10 =
200
21.
9 × 40 = 9 × 4 × 10 = 36 × 10 =
360
22.
7 × 10 = 7 × 1 × 10 = 7 × 10 =
70
23.
3 × 10 = 3 × 1 × 10 = 3 × 10 =
30
24.
6 × 90 = 6 × 9 × 10 = 54 × 10 =
540
25.
8 × 20 = 8 × 2 × 10 = 16 × 10 =
160
26.
4 × 40 = 4 × 4 × 10 = 16 × 10 =
160
27.
4 × 70 = 4 × 7 × 10 = 28 × 10 =
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
✔ All problems solved!
This type of multiplication builds foundational skills for larger number multiplication and helps students understand place value.
Parent Tip: Review the logic above to help your child master the concept of addition worksheet for 3rd graders.
