Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 97 · 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. 1.25 × 32 =
2. 2.55 × 34 =
3. 3.35 × 24 =
4. 4.15 × 24 =
5. 5.38 × 125 =
6. 6.40 × 15 =
7. 7.8 × 65 =
8. 8.16 × 55 =
9. 9.15 × 38 =
10. 10.45 × 12 =
11. 11.25 × 8 =
12. 12.55 × 8 =
13. 13.25 × 28 =
14. 14.65 × 10 =
15. 15.30 × 75 =
16. 16.35 × 26 =
17. 17.12 × 35 =
18. 18.75 × 6 =
19. 19.38 × 125 =
20. 20.18 × 75 =
21. 21.75 × 14 =
22. 22.15 × 36 =
23. 23.10 × 15 =
24. 24.24 × 65 =
25. 25.12 × 45 =
26. 26.65 × 8 =
27. 27.34 × 15 =
28. 28.65 × 6 =
29. 29.35 × 36 =
30. 30.30 × 15 =
31. 31.45 × 22 =
32. 32.125 × 6 =
33. 33.25 × 20 =
34. 34.35 × 10 =
35. 35.55 × 20 =
36. 36.18 × 55 =
37. 37.14 × 25 =
38. 38.36 × 25 =
39. 39.55 × 30 =
40. 40.10 × 75 =

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