Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 442 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.30 × 15 =
2. 2.35 × 18 =
3. 3.15 × 28 =
4. 4.75 × 12 =
5. 5.14 × 125 =
6. 6.6 × 65 =
7. 7.6 × 25 =
8. 8.125 × 18 =
9. 9.35 × 8 =
10. 10.35 × 22 =
11. 11.28 × 75 =
12. 12.35 × 34 =
13. 13.65 × 18 =
14. 14.35 × 18 =
15. 15.16 × 25 =
16. 16.75 × 28 =
17. 17.24 × 65 =
18. 18.10 × 15 =
19. 19.10 × 15 =
20. 20.35 × 6 =
21. 21.10 × 45 =
22. 22.75 × 14 =
23. 23.34 × 15 =
24. 24.16 × 35 =
25. 25.25 × 10 =
26. 26.32 × 65 =
27. 27.12 × 45 =
28. 28.40 × 25 =
29. 29.40 × 25 =
30. 30.55 × 26 =
31. 31.12 × 45 =
32. 32.14 × 55 =
33. 33.15 × 28 =
34. 34.40 × 55 =
35. 35.18 × 65 =
36. 36.12 × 55 =
37. 37.12 × 55 =
38. 38.55 × 12 =
39. 39.35 × 26 =
40. 40.26 × 125 =

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