Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 114 · 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. 1.65 × 28 =
2. 2.15 × 14 =
3. 3.8 × 25 =
4. 4.18 × 45 =
5. 5.55 × 28 =
6. 6.40 × 55 =
7. 7.35 × 22 =
8. 8.75 × 16 =
9. 9.75 × 10 =
10. 10.15 × 20 =
11. 11.40 × 35 =
12. 12.45 × 34 =
13. 13.55 × 16 =
14. 14.25 × 24 =
15. 15.40 × 65 =
16. 16.125 × 10 =
17. 17.10 × 75 =
18. 18.26 × 45 =
19. 19.38 × 25 =
20. 20.28 × 45 =
21. 21.34 × 75 =
22. 22.25 × 24 =
23. 23.36 × 35 =
24. 24.15 × 34 =
25. 25.15 × 38 =
26. 26.65 × 36 =
27. 27.12 × 75 =
28. 28.35 × 6 =
29. 29.12 × 45 =
30. 30.6 × 125 =
31. 31.15 × 12 =
32. 32.55 × 20 =
33. 33.24 × 75 =
34. 34.125 × 38 =
35. 35.38 × 15 =
36. 36.45 × 34 =
37. 37.12 × 55 =
38. 38.125 × 20 =
39. 39.75 × 32 =
40. 40.75 × 20 =

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