Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 793 · 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. 1.65 × 8 =
2. 2.35 × 28 =
3. 3.14 × 55 =
4. 4.15 × 8 =
5. 5.15 × 12 =
6. 6.75 × 38 =
7. 7.12 × 35 =
8. 8.125 × 28 =
9. 9.25 × 24 =
10. 10.32 × 35 =
11. 11.14 × 45 =
12. 12.125 × 6 =
13. 13.30 × 25 =
14. 14.10 × 35 =
15. 15.45 × 24 =
16. 16.125 × 40 =
17. 17.75 × 16 =
18. 18.25 × 16 =
19. 19.25 × 32 =
20. 20.45 × 40 =
21. 21.15 × 26 =
22. 22.55 × 10 =
23. 23.34 × 75 =
24. 24.55 × 24 =
25. 25.8 × 55 =
26. 26.55 × 38 =
27. 27.25 × 22 =
28. 28.22 × 55 =
29. 29.15 × 28 =
30. 30.14 × 65 =
31. 31.125 × 6 =
32. 32.65 × 16 =
33. 33.24 × 35 =
34. 34.22 × 125 =
35. 35.15 × 32 =
36. 36.25 × 18 =
37. 37.28 × 15 =
38. 38.45 × 16 =
39. 39.35 × 38 =
40. 40.35 × 10 =

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