Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 378 · 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 × 32 =
2. 2.25 × 24 =
3. 3.26 × 35 =
4. 4.30 × 15 =
5. 5.36 × 35 =
6. 6.35 × 10 =
7. 7.25 × 10 =
8. 8.45 × 20 =
9. 9.55 × 24 =
10. 10.22 × 55 =
11. 11.125 × 22 =
12. 12.15 × 32 =
13. 13.30 × 25 =
14. 14.45 × 22 =
15. 15.75 × 26 =
16. 16.125 × 10 =
17. 17.35 × 32 =
18. 18.55 × 16 =
19. 19.40 × 15 =
20. 20.125 × 26 =
21. 21.26 × 35 =
22. 22.15 × 14 =
23. 23.45 × 10 =
24. 24.75 × 22 =
25. 25.12 × 65 =
26. 26.55 × 24 =
27. 27.32 × 35 =
28. 28.25 × 36 =
29. 29.25 × 16 =
30. 30.26 × 15 =
31. 31.55 × 16 =
32. 32.36 × 75 =
33. 33.45 × 40 =
34. 34.55 × 32 =
35. 35.12 × 55 =
36. 36.36 × 35 =
37. 37.25 × 24 =
38. 38.55 × 30 =
39. 39.34 × 65 =
40. 40.22 × 15 =

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