Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 394 · 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. 1.35 × 36 =
2. 2.8 × 25 =
3. 3.15 × 8 =
4. 4.14 × 45 =
5. 5.25 × 24 =
6. 6.35 × 38 =
7. 7.36 × 125 =
8. 8.6 × 55 =
9. 9.26 × 35 =
10. 10.65 × 28 =
11. 11.75 × 8 =
12. 12.6 × 35 =
13. 13.30 × 25 =
14. 14.24 × 65 =
15. 15.35 × 24 =
16. 16.75 × 10 =
17. 17.24 × 75 =
18. 18.45 × 38 =
19. 19.15 × 8 =
20. 20.16 × 75 =
21. 21.65 × 8 =
22. 22.75 × 16 =
23. 23.15 × 10 =
24. 24.75 × 8 =
25. 25.15 × 22 =
26. 26.15 × 32 =
27. 27.15 × 22 =
28. 28.22 × 55 =
29. 29.125 × 34 =
30. 30.32 × 75 =
31. 31.125 × 6 =
32. 32.36 × 55 =
33. 33.15 × 28 =
34. 34.25 × 30 =
35. 35.12 × 45 =
36. 36.36 × 45 =
37. 37.20 × 25 =
38. 38.8 × 125 =
39. 39.25 × 14 =
40. 40.16 × 15 =

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