Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 742 · 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. 2.125 × 40 =
3. 3.65 × 34 =
4. 4.18 × 15 =
5. 5.36 × 15 =
6. 6.24 × 15 =
7. 7.75 × 20 =
8. 8.36 × 75 =
9. 9.28 × 125 =
10. 10.55 × 34 =
11. 11.12 × 45 =
12. 12.65 × 12 =
13. 13.15 × 8 =
14. 14.6 × 35 =
15. 15.15 × 18 =
16. 16.15 × 26 =
17. 17.22 × 15 =
18. 18.45 × 18 =
19. 19.30 × 65 =
20. 20.12 × 65 =
21. 21.40 × 15 =
22. 22.35 × 22 =
23. 23.125 × 38 =
24. 24.25 × 30 =
25. 25.75 × 20 =
26. 26.15 × 30 =
27. 27.35 × 10 =
28. 28.125 × 26 =
29. 29.16 × 45 =
30. 30.28 × 15 =
31. 31.15 × 24 =
32. 32.18 × 35 =
33. 33.22 × 15 =
34. 34.55 × 14 =
35. 35.18 × 15 =
36. 36.16 × 25 =
37. 37.16 × 125 =
38. 38.20 × 15 =
39. 39.6 × 35 =
40. 40.25 × 10 =

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