Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 57 · 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 × 38 =
2. 2.45 × 6 =
3. 3.45 × 6 =
4. 4.75 × 12 =
5. 5.22 × 45 =
6. 6.12 × 125 =
7. 7.12 × 65 =
8. 8.15 × 26 =
9. 9.32 × 25 =
10. 10.75 × 26 =
11. 11.8 × 15 =
12. 12.6 × 125 =
13. 13.75 × 24 =
14. 14.8 × 25 =
15. 15.35 × 34 =
16. 16.38 × 125 =
17. 17.8 × 65 =
18. 18.15 × 20 =
19. 19.15 × 8 =
20. 20.28 × 25 =
21. 21.20 × 35 =
22. 22.35 × 38 =
23. 23.25 × 38 =
24. 24.65 × 26 =
25. 25.55 × 22 =
26. 26.25 × 14 =
27. 27.125 × 10 =
28. 28.55 × 16 =
29. 29.125 × 28 =
30. 30.65 × 34 =
31. 31.125 × 12 =
32. 32.55 × 34 =
33. 33.24 × 15 =
34. 34.22 × 15 =
35. 35.65 × 38 =
36. 36.25 × 34 =
37. 37.55 × 24 =
38. 38.6 × 25 =
39. 39.75 × 34 =
40. 40.16 × 65 =

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