Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 846 · 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. 1.38 × 65 =
2. 2.75 × 34 =
3. 3.45 × 26 =
4. 4.65 × 12 =
5. 5.15 × 36 =
6. 6.15 × 26 =
7. 7.18 × 65 =
8. 8.6 × 35 =
9. 9.25 × 30 =
10. 10.10 × 75 =
11. 11.65 × 28 =
12. 12.25 × 24 =
13. 13.125 × 34 =
14. 14.75 × 6 =
15. 15.15 × 24 =
16. 16.32 × 125 =
17. 17.26 × 75 =
18. 18.28 × 55 =
19. 19.75 × 40 =
20. 20.15 × 34 =
21. 21.55 × 22 =
22. 22.35 × 40 =
23. 23.25 × 6 =
24. 24.25 × 40 =
25. 25.75 × 30 =
26. 26.8 × 35 =
27. 27.45 × 28 =
28. 28.12 × 65 =
29. 29.40 × 65 =
30. 30.6 × 75 =
31. 31.25 × 24 =
32. 32.45 × 8 =
33. 33.38 × 65 =
34. 34.16 × 45 =
35. 35.20 × 15 =
36. 36.26 × 55 =
37. 37.40 × 45 =
38. 38.32 × 55 =
39. 39.10 × 45 =
40. 40.16 × 15 =

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