Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 7 · 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 × 16 =
2. 2.125 × 10 =
3. 3.36 × 35 =
4. 4.28 × 25 =
5. 5.25 × 22 =
6. 6.55 × 14 =
7. 7.15 × 28 =
8. 8.65 × 18 =
9. 9.15 × 26 =
10. 10.15 × 26 =
11. 11.25 × 38 =
12. 12.35 × 10 =
13. 13.25 × 34 =
14. 14.8 × 75 =
15. 15.75 × 24 =
16. 16.15 × 28 =
17. 17.22 × 55 =
18. 18.22 × 45 =
19. 19.15 × 22 =
20. 20.45 × 20 =
21. 21.24 × 65 =
22. 22.34 × 75 =
23. 23.75 × 36 =
24. 24.35 × 16 =
25. 25.15 × 14 =
26. 26.18 × 55 =
27. 27.15 × 22 =
28. 28.38 × 75 =
29. 29.25 × 12 =
30. 30.35 × 10 =
31. 31.40 × 25 =
32. 32.35 × 34 =
33. 33.18 × 15 =
34. 34.10 × 45 =
35. 35.32 × 125 =
36. 36.30 × 35 =
37. 37.15 × 8 =
38. 38.22 × 15 =
39. 39.6 × 25 =
40. 40.65 × 22 =

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