Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 507 · 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. 1.26 × 65 =
2. 2.125 × 36 =
3. 3.35 × 22 =
4. 4.35 × 10 =
5. 5.15 × 30 =
6. 6.15 × 36 =
7. 7.20 × 55 =
8. 8.38 × 25 =
9. 9.38 × 55 =
10. 10.22 × 35 =
11. 11.25 × 6 =
12. 12.25 × 14 =
13. 13.125 × 10 =
14. 14.20 × 75 =
15. 15.18 × 15 =
16. 16.24 × 15 =
17. 17.65 × 36 =
18. 18.35 × 18 =
19. 19.45 × 32 =
20. 20.20 × 15 =
21. 21.20 × 55 =
22. 22.25 × 8 =
23. 23.35 × 40 =
24. 24.16 × 125 =
25. 25.24 × 65 =
26. 26.8 × 65 =
27. 27.8 × 35 =
28. 28.12 × 35 =
29. 29.15 × 12 =
30. 30.125 × 26 =
31. 31.35 × 12 =
32. 32.22 × 55 =
33. 33.25 × 38 =
34. 34.75 × 14 =
35. 35.75 × 38 =
36. 36.6 × 55 =
37. 37.6 × 35 =
38. 38.34 × 15 =
39. 39.45 × 14 =
40. 40.8 × 45 =

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