Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 463 · 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. 1.35 × 22 =
2. 2.35 × 26 =
3. 3.26 × 15 =
4. 4.65 × 40 =
5. 5.36 × 65 =
6. 6.25 × 14 =
7. 7.25 × 14 =
8. 8.32 × 25 =
9. 9.10 × 45 =
10. 10.125 × 38 =
11. 11.34 × 15 =
12. 12.34 × 65 =
13. 13.35 × 22 =
14. 14.25 × 36 =
15. 15.32 × 15 =
16. 16.34 × 125 =
17. 17.35 × 40 =
18. 18.15 × 10 =
19. 19.125 × 16 =
20. 20.18 × 25 =
21. 21.22 × 65 =
22. 22.24 × 55 =
23. 23.6 × 65 =
24. 24.25 × 8 =
25. 25.6 × 75 =
26. 26.55 × 28 =
27. 27.125 × 10 =
28. 28.6 × 55 =
29. 29.14 × 55 =
30. 30.20 × 15 =
31. 31.125 × 8 =
32. 32.16 × 15 =
33. 33.24 × 35 =
34. 34.6 × 55 =
35. 35.125 × 6 =
36. 36.65 × 6 =
37. 37.125 × 36 =
38. 38.24 × 35 =
39. 39.22 × 65 =
40. 40.55 × 16 =

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