Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 473 · 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 × 32 =
2. 2.125 × 6 =
3. 3.25 × 36 =
4. 4.15 × 32 =
5. 5.55 × 38 =
6. 6.15 × 20 =
7. 7.65 × 18 =
8. 8.25 × 26 =
9. 9.25 × 14 =
10. 10.65 × 26 =
11. 11.65 × 30 =
12. 12.65 × 34 =
13. 13.65 × 12 =
14. 14.15 × 38 =
15. 15.55 × 28 =
16. 16.10 × 75 =
17. 17.34 × 15 =
18. 18.32 × 125 =
19. 19.15 × 14 =
20. 20.40 × 35 =
21. 21.25 × 28 =
22. 22.6 × 25 =
23. 23.10 × 35 =
24. 24.12 × 45 =
25. 25.65 × 32 =
26. 26.12 × 35 =
27. 27.75 × 8 =
28. 28.18 × 55 =
29. 29.15 × 34 =
30. 30.35 × 28 =
31. 31.40 × 35 =
32. 32.15 × 16 =
33. 33.36 × 25 =
34. 34.28 × 125 =
35. 35.125 × 6 =
36. 36.45 × 18 =
37. 37.20 × 25 =
38. 38.45 × 28 =
39. 39.25 × 38 =
40. 40.34 × 15 =

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