Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 98 · 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. 1.55 × 32 =
2. 2.22 × 55 =
3. 3.55 × 18 =
4. 4.6 × 25 =
5. 5.38 × 15 =
6. 6.16 × 65 =
7. 7.15 × 18 =
8. 8.125 × 16 =
9. 9.75 × 20 =
10. 10.22 × 75 =
11. 11.14 × 15 =
12. 12.25 × 26 =
13. 13.65 × 20 =
14. 14.25 × 28 =
15. 15.45 × 6 =
16. 16.45 × 24 =
17. 17.15 × 18 =
18. 18.35 × 22 =
19. 19.20 × 15 =
20. 20.55 × 22 =
21. 21.35 × 6 =
22. 22.14 × 25 =
23. 23.15 × 38 =
24. 24.35 × 22 =
25. 25.34 × 65 =
26. 26.34 × 75 =
27. 27.125 × 28 =
28. 28.65 × 12 =
29. 29.12 × 65 =
30. 30.6 × 55 =
31. 31.10 × 35 =
32. 32.65 × 34 =
33. 33.35 × 36 =
34. 34.65 × 14 =
35. 35.10 × 55 =
36. 36.15 × 30 =
37. 37.45 × 12 =
38. 38.15 × 16 =
39. 39.20 × 35 =
40. 40.55 × 40 =

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