Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 534 · 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. 1.30 × 35 =
2. 2.55 × 22 =
3. 3.26 × 25 =
4. 4.12 × 45 =
5. 5.65 × 6 =
6. 6.65 × 34 =
7. 7.75 × 32 =
8. 8.75 × 10 =
9. 9.36 × 125 =
10. 10.55 × 22 =
11. 11.24 × 25 =
12. 12.24 × 125 =
13. 13.35 × 6 =
14. 14.25 × 22 =
15. 15.125 × 36 =
16. 16.32 × 55 =
17. 17.26 × 15 =
18. 18.45 × 24 =
19. 19.45 × 12 =
20. 20.25 × 36 =
21. 21.30 × 35 =
22. 22.55 × 38 =
23. 23.35 × 14 =
24. 24.12 × 45 =
25. 25.25 × 16 =
26. 26.55 × 16 =
27. 27.25 × 6 =
28. 28.40 × 45 =
29. 29.35 × 24 =
30. 30.35 × 6 =
31. 31.55 × 18 =
32. 32.45 × 30 =
33. 33.32 × 35 =
34. 34.38 × 25 =
35. 35.55 × 24 =
36. 36.15 × 16 =
37. 37.14 × 125 =
38. 38.36 × 65 =
39. 39.25 × 6 =
40. 40.16 × 75 =

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