Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 635 · 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. 1.16 × 65 =
2. 2.45 × 8 =
3. 3.20 × 35 =
4. 4.20 × 15 =
5. 5.38 × 125 =
6. 6.75 × 18 =
7. 7.6 × 35 =
8. 8.20 × 55 =
9. 9.18 × 15 =
10. 10.25 × 14 =
11. 11.35 × 40 =
12. 12.65 × 16 =
13. 13.38 × 65 =
14. 14.22 × 75 =
15. 15.25 × 14 =
16. 16.75 × 24 =
17. 17.15 × 10 =
18. 18.45 × 14 =
19. 19.6 × 65 =
20. 20.24 × 65 =
21. 21.75 × 14 =
22. 22.125 × 36 =
23. 23.45 × 24 =
24. 24.75 × 22 =
25. 25.45 × 28 =
26. 26.45 × 20 =
27. 27.25 × 40 =
28. 28.10 × 35 =
29. 29.30 × 45 =
30. 30.25 × 10 =
31. 31.12 × 25 =
32. 32.40 × 25 =
33. 33.75 × 10 =
34. 34.35 × 34 =
35. 35.10 × 25 =
36. 36.24 × 35 =
37. 37.125 × 6 =
38. 38.15 × 18 =
39. 39.40 × 65 =
40. 40.40 × 75 =

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