Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 572 · 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 × 15 =
2. 2.22 × 25 =
3. 3.6 × 15 =
4. 4.55 × 40 =
5. 5.65 × 12 =
6. 6.125 × 12 =
7. 7.125 × 28 =
8. 8.65 × 34 =
9. 9.125 × 12 =
10. 10.14 × 65 =
11. 11.40 × 15 =
12. 12.65 × 34 =
13. 13.30 × 25 =
14. 14.38 × 65 =
15. 15.25 × 28 =
16. 16.34 × 75 =
17. 17.35 × 24 =
18. 18.40 × 45 =
19. 19.32 × 25 =
20. 20.45 × 36 =
21. 21.15 × 14 =
22. 22.26 × 35 =
23. 23.8 × 15 =
24. 24.55 × 38 =
25. 25.36 × 55 =
26. 26.32 × 75 =
27. 27.14 × 125 =
28. 28.25 × 8 =
29. 29.16 × 65 =
30. 30.16 × 25 =
31. 31.32 × 65 =
32. 32.34 × 65 =
33. 33.12 × 55 =
34. 34.15 × 32 =
35. 35.6 × 75 =
36. 36.36 × 75 =
37. 37.10 × 45 =
38. 38.65 × 34 =
39. 39.35 × 8 =
40. 40.75 × 14 =

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