Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 787 · 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 × 6 =
2. 2.12 × 25 =
3. 3.18 × 25 =
4. 4.6 × 55 =
5. 5.6 × 25 =
6. 6.32 × 125 =
7. 7.75 × 28 =
8. 8.12 × 125 =
9. 9.35 × 18 =
10. 10.15 × 32 =
11. 11.75 × 22 =
12. 12.25 × 10 =
13. 13.65 × 12 =
14. 14.40 × 65 =
15. 15.65 × 28 =
16. 16.38 × 75 =
17. 17.45 × 28 =
18. 18.65 × 10 =
19. 19.75 × 16 =
20. 20.16 × 65 =
21. 21.35 × 20 =
22. 22.32 × 15 =
23. 23.55 × 16 =
24. 24.34 × 25 =
25. 25.55 × 22 =
26. 26.45 × 30 =
27. 27.35 × 36 =
28. 28.35 × 40 =
29. 29.36 × 35 =
30. 30.32 × 25 =
31. 31.36 × 65 =
32. 32.28 × 65 =
33. 33.125 × 38 =
34. 34.28 × 75 =
35. 35.35 × 12 =
36. 36.38 × 25 =
37. 37.25 × 26 =
38. 38.55 × 10 =
39. 39.25 × 22 =
40. 40.16 × 45 =

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