Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 945 · 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. 2.55 × 26 =
3. 3.45 × 6 =
4. 4.24 × 35 =
5. 5.10 × 25 =
6. 6.15 × 36 =
7. 7.55 × 24 =
8. 8.25 × 40 =
9. 9.30 × 15 =
10. 10.45 × 6 =
11. 11.75 × 22 =
12. 12.25 × 34 =
13. 13.65 × 18 =
14. 14.20 × 75 =
15. 15.16 × 65 =
16. 16.35 × 36 =
17. 17.25 × 34 =
18. 18.16 × 25 =
19. 19.8 × 45 =
20. 20.14 × 15 =
21. 21.65 × 6 =
22. 22.32 × 55 =
23. 23.8 × 35 =
24. 24.15 × 10 =
25. 25.24 × 55 =
26. 26.65 × 6 =
27. 27.10 × 75 =
28. 28.12 × 35 =
29. 29.32 × 125 =
30. 30.10 × 65 =
31. 31.125 × 8 =
32. 32.25 × 20 =
33. 33.65 × 36 =
34. 34.45 × 20 =
35. 35.16 × 65 =
36. 36.15 × 16 =
37. 37.12 × 45 =
38. 38.125 × 20 =
39. 39.24 × 125 =
40. 40.38 × 65 =

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