Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 856 · 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. 1.25 × 16 =
2. 2.15 × 14 =
3. 3.55 × 6 =
4. 4.45 × 14 =
5. 5.75 × 24 =
6. 6.55 × 26 =
7. 7.18 × 45 =
8. 8.10 × 45 =
9. 9.28 × 15 =
10. 10.38 × 65 =
11. 11.20 × 75 =
12. 12.28 × 25 =
13. 13.125 × 6 =
14. 14.10 × 35 =
15. 15.30 × 65 =
16. 16.14 × 75 =
17. 17.12 × 55 =
18. 18.35 × 14 =
19. 19.65 × 10 =
20. 20.65 × 18 =
21. 21.45 × 14 =
22. 22.35 × 38 =
23. 23.16 × 55 =
24. 24.75 × 24 =
25. 25.32 × 65 =
26. 26.25 × 20 =
27. 27.65 × 38 =
28. 28.18 × 25 =
29. 29.55 × 30 =
30. 30.12 × 15 =
31. 31.15 × 6 =
32. 32.34 × 35 =
33. 33.65 × 14 =
34. 34.75 × 40 =
35. 35.25 × 6 =
36. 36.25 × 8 =
37. 37.35 × 30 =
38. 38.125 × 6 =
39. 39.25 × 36 =
40. 40.22 × 25 =

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