Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 438 · 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. 1.25 × 12 =
2. 2.65 × 22 =
3. 3.45 × 12 =
4. 4.36 × 65 =
5. 5.125 × 12 =
6. 6.20 × 75 =
7. 7.15 × 6 =
8. 8.45 × 30 =
9. 9.6 × 15 =
10. 10.55 × 26 =
11. 11.65 × 14 =
12. 12.25 × 32 =
13. 13.75 × 18 =
14. 14.125 × 18 =
15. 15.24 × 65 =
16. 16.35 × 8 =
17. 17.125 × 16 =
18. 18.25 × 6 =
19. 19.75 × 36 =
20. 20.32 × 35 =
21. 21.125 × 22 =
22. 22.6 × 75 =
23. 23.6 × 35 =
24. 24.35 × 10 =
25. 25.18 × 15 =
26. 26.18 × 125 =
27. 27.25 × 26 =
28. 28.55 × 22 =
29. 29.15 × 34 =
30. 30.65 × 30 =
31. 31.45 × 8 =
32. 32.15 × 24 =
33. 33.12 × 45 =
34. 34.25 × 30 =
35. 35.8 × 35 =
36. 36.15 × 36 =
37. 37.14 × 35 =
38. 38.28 × 125 =
39. 39.25 × 18 =
40. 40.15 × 8 =

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