Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 371 · 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. 1.35 × 14 =
2. 2.45 × 10 =
3. 3.12 × 65 =
4. 4.8 × 15 =
5. 5.15 × 16 =
6. 6.22 × 65 =
7. 7.36 × 65 =
8. 8.18 × 125 =
9. 9.35 × 18 =
10. 10.28 × 55 =
11. 11.12 × 35 =
12. 12.32 × 65 =
13. 13.65 × 32 =
14. 14.32 × 55 =
15. 15.65 × 40 =
16. 16.34 × 75 =
17. 17.15 × 26 =
18. 18.28 × 45 =
19. 19.75 × 14 =
20. 20.55 × 8 =
21. 21.14 × 45 =
22. 22.65 × 40 =
23. 23.55 × 22 =
24. 24.125 × 6 =
25. 25.14 × 65 =
26. 26.55 × 12 =
27. 27.38 × 55 =
28. 28.75 × 22 =
29. 29.28 × 35 =
30. 30.65 × 12 =
31. 31.45 × 10 =
32. 32.8 × 15 =
33. 33.16 × 45 =
34. 34.12 × 75 =
35. 35.65 × 14 =
36. 36.30 × 15 =
37. 37.55 × 38 =
38. 38.65 × 38 =
39. 39.40 × 25 =
40. 40.65 × 18 =

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