Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 1 · 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 × 38 =
2. 2.8 × 55 =
3. 3.65 × 24 =
4. 4.34 × 75 =
5. 5.34 × 35 =
6. 6.6 × 65 =
7. 7.16 × 15 =
8. 8.25 × 16 =
9. 9.40 × 15 =
10. 10.65 × 24 =
11. 11.65 × 34 =
12. 12.45 × 38 =
13. 13.55 × 16 =
14. 14.25 × 14 =
15. 15.125 × 32 =
16. 16.45 × 24 =
17. 17.10 × 15 =
18. 18.38 × 65 =
19. 19.14 × 35 =
20. 20.45 × 38 =
21. 21.14 × 15 =
22. 22.25 × 24 =
23. 23.26 × 55 =
24. 24.14 × 45 =
25. 25.25 × 6 =
26. 26.45 × 16 =
27. 27.24 × 45 =
28. 28.18 × 75 =
29. 29.30 × 35 =
30. 30.75 × 30 =
31. 31.30 × 35 =
32. 32.45 × 20 =
33. 33.38 × 35 =
34. 34.65 × 32 =
35. 35.15 × 18 =
36. 36.12 × 55 =
37. 37.6 × 125 =
38. 38.35 × 6 =
39. 39.40 × 45 =
40. 40.35 × 16 =

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