Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 739 · 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 × 12 =
2. 2.22 × 65 =
3. 3.75 × 38 =
4. 4.30 × 65 =
5. 5.55 × 34 =
6. 6.65 × 20 =
7. 7.15 × 20 =
8. 8.10 × 45 =
9. 9.30 × 75 =
10. 10.125 × 26 =
11. 11.15 × 36 =
12. 12.75 × 14 =
13. 13.22 × 45 =
14. 14.15 × 14 =
15. 15.55 × 22 =
16. 16.38 × 125 =
17. 17.75 × 22 =
18. 18.18 × 25 =
19. 19.34 × 55 =
20. 20.15 × 20 =
21. 21.65 × 16 =
22. 22.10 × 15 =
23. 23.14 × 65 =
24. 24.65 × 34 =
25. 25.75 × 26 =
26. 26.16 × 45 =
27. 27.65 × 6 =
28. 28.125 × 6 =
29. 29.45 × 40 =
30. 30.22 × 65 =
31. 31.26 × 45 =
32. 32.22 × 15 =
33. 33.40 × 15 =
34. 34.55 × 28 =
35. 35.8 × 65 =
36. 36.125 × 20 =
37. 37.22 × 45 =
38. 38.65 × 16 =
39. 39.26 × 75 =
40. 40.10 × 15 =

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