Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 690 · 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. 1.55 × 24 =
2. 2.65 × 26 =
3. 3.30 × 65 =
4. 4.12 × 75 =
5. 5.20 × 15 =
6. 6.35 × 12 =
7. 7.10 × 25 =
8. 8.34 × 45 =
9. 9.15 × 38 =
10. 10.6 × 55 =
11. 11.12 × 65 =
12. 12.6 × 25 =
13. 13.25 × 12 =
14. 14.16 × 45 =
15. 15.15 × 22 =
16. 16.40 × 35 =
17. 17.25 × 16 =
18. 18.12 × 75 =
19. 19.12 × 45 =
20. 20.28 × 25 =
21. 21.22 × 45 =
22. 22.45 × 28 =
23. 23.25 × 32 =
24. 24.25 × 16 =
25. 25.35 × 30 =
26. 26.18 × 55 =
27. 27.30 × 65 =
28. 28.6 × 35 =
29. 29.14 × 45 =
30. 30.25 × 36 =
31. 31.26 × 55 =
32. 32.55 × 26 =
33. 33.25 × 14 =
34. 34.15 × 36 =
35. 35.55 × 18 =
36. 36.18 × 15 =
37. 37.125 × 8 =
38. 38.35 × 6 =
39. 39.24 × 15 =
40. 40.36 × 75 =

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