Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 96 · 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. 1.125 × 18 =
2. 2.30 × 15 =
3. 3.12 × 65 =
4. 4.32 × 55 =
5. 5.30 × 55 =
6. 6.125 × 24 =
7. 7.32 × 65 =
8. 8.30 × 45 =
9. 9.65 × 20 =
10. 10.55 × 16 =
11. 11.22 × 65 =
12. 12.25 × 26 =
13. 13.35 × 26 =
14. 14.65 × 16 =
15. 15.32 × 25 =
16. 16.12 × 35 =
17. 17.15 × 34 =
18. 18.75 × 26 =
19. 19.20 × 65 =
20. 20.15 × 10 =
21. 21.25 × 32 =
22. 22.125 × 38 =
23. 23.125 × 22 =
24. 24.55 × 22 =
25. 25.16 × 15 =
26. 26.125 × 16 =
27. 27.16 × 15 =
28. 28.36 × 125 =
29. 29.10 × 45 =
30. 30.34 × 75 =
31. 31.125 × 18 =
32. 32.35 × 16 =
33. 33.55 × 14 =
34. 34.45 × 38 =
35. 35.36 × 75 =
36. 36.26 × 45 =
37. 37.75 × 20 =
38. 38.25 × 22 =
39. 39.22 × 35 =
40. 40.35 × 14 =

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