Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 236 · 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 × 36 =
2. 2.8 × 75 =
3. 3.18 × 15 =
4. 4.65 × 8 =
5. 5.8 × 35 =
6. 6.20 × 65 =
7. 7.55 × 18 =
8. 8.75 × 32 =
9. 9.28 × 25 =
10. 10.15 × 26 =
11. 11.15 × 12 =
12. 12.15 × 12 =
13. 13.125 × 38 =
14. 14.15 × 32 =
15. 15.24 × 55 =
16. 16.10 × 65 =
17. 17.26 × 75 =
18. 18.14 × 15 =
19. 19.65 × 12 =
20. 20.32 × 35 =
21. 21.65 × 34 =
22. 22.75 × 10 =
23. 23.35 × 18 =
24. 24.24 × 75 =
25. 25.55 × 6 =
26. 26.26 × 15 =
27. 27.35 × 34 =
28. 28.35 × 22 =
29. 29.65 × 30 =
30. 30.18 × 35 =
31. 31.28 × 15 =
32. 32.32 × 55 =
33. 33.35 × 8 =
34. 34.28 × 15 =
35. 35.34 × 125 =
36. 36.75 × 40 =
37. 37.45 × 8 =
38. 38.8 × 65 =
39. 39.65 × 26 =
40. 40.15 × 6 =

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