Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 698 · 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. 1.15 × 14 =
2. 2.35 × 20 =
3. 3.35 × 18 =
4. 4.45 × 18 =
5. 5.24 × 65 =
6. 6.28 × 55 =
7. 7.25 × 32 =
8. 8.45 × 16 =
9. 9.30 × 55 =
10. 10.45 × 16 =
11. 11.125 × 12 =
12. 12.10 × 25 =
13. 13.40 × 25 =
14. 14.32 × 75 =
15. 15.15 × 24 =
16. 16.75 × 14 =
17. 17.45 × 36 =
18. 18.125 × 16 =
19. 19.65 × 12 =
20. 20.25 × 10 =
21. 21.15 × 12 =
22. 22.34 × 125 =
23. 23.34 × 45 =
24. 24.30 × 25 =
25. 25.20 × 45 =
26. 26.15 × 18 =
27. 27.125 × 14 =
28. 28.22 × 125 =
29. 29.38 × 65 =
30. 30.55 × 12 =
31. 31.35 × 14 =
32. 32.15 × 38 =
33. 33.35 × 34 =
34. 34.35 × 18 =
35. 35.15 × 24 =
36. 36.25 × 40 =
37. 37.8 × 125 =
38. 38.75 × 36 =
39. 39.75 × 32 =
40. 40.25 × 18 =

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