Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 290 · 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. 1.45 × 22 =
2. 2.30 × 125 =
3. 3.8 × 15 =
4. 4.35 × 38 =
5. 5.35 × 36 =
6. 6.65 × 8 =
7. 7.34 × 75 =
8. 8.12 × 35 =
9. 9.15 × 40 =
10. 10.35 × 6 =
11. 11.125 × 34 =
12. 12.10 × 15 =
13. 13.40 × 55 =
14. 14.14 × 15 =
15. 15.12 × 45 =
16. 16.15 × 6 =
17. 17.55 × 32 =
18. 18.10 × 35 =
19. 19.12 × 25 =
20. 20.28 × 125 =
21. 21.75 × 14 =
22. 22.25 × 24 =
23. 23.10 × 45 =
24. 24.55 × 38 =
25. 25.75 × 28 =
26. 26.28 × 15 =
27. 27.65 × 32 =
28. 28.125 × 6 =
29. 29.55 × 18 =
30. 30.35 × 16 =
31. 31.35 × 26 =
32. 32.25 × 40 =
33. 33.125 × 10 =
34. 34.6 × 55 =
35. 35.125 × 20 =
36. 36.30 × 15 =
37. 37.8 × 75 =
38. 38.125 × 30 =
39. 39.55 × 40 =
40. 40.15 × 36 =

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