Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 971 · 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. 1.18 × 45 =
2. 2.30 × 15 =
3. 3.15 × 30 =
4. 4.28 × 75 =
5. 5.24 × 125 =
6. 6.32 × 25 =
7. 7.8 × 65 =
8. 8.75 × 24 =
9. 9.6 × 35 =
10. 10.28 × 35 =
11. 11.18 × 35 =
12. 12.40 × 35 =
13. 13.26 × 75 =
14. 14.18 × 75 =
15. 15.25 × 22 =
16. 16.28 × 15 =
17. 17.75 × 26 =
18. 18.75 × 30 =
19. 19.45 × 20 =
20. 20.28 × 25 =
21. 21.15 × 8 =
22. 22.10 × 75 =
23. 23.35 × 30 =
24. 24.34 × 125 =
25. 25.18 × 55 =
26. 26.10 × 65 =
27. 27.65 × 10 =
28. 28.15 × 10 =
29. 29.25 × 16 =
30. 30.35 × 38 =
31. 31.25 × 38 =
32. 32.65 × 16 =
33. 33.15 × 40 =
34. 34.22 × 45 =
35. 35.25 × 6 =
36. 36.55 × 6 =
37. 37.36 × 75 =
38. 38.55 × 14 =
39. 39.55 × 8 =
40. 40.34 × 55 =

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