Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 332 · 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 × 34 =
2. 2.25 × 34 =
3. 3.25 × 16 =
4. 4.75 × 22 =
5. 5.26 × 55 =
6. 6.15 × 16 =
7. 7.14 × 75 =
8. 8.10 × 15 =
9. 9.15 × 22 =
10. 10.22 × 25 =
11. 11.65 × 36 =
12. 12.24 × 75 =
13. 13.75 × 24 =
14. 14.55 × 12 =
15. 15.125 × 16 =
16. 16.26 × 45 =
17. 17.25 × 12 =
18. 18.45 × 18 =
19. 19.125 × 20 =
20. 20.25 × 6 =
21. 21.40 × 25 =
22. 22.12 × 55 =
23. 23.32 × 25 =
24. 24.14 × 125 =
25. 25.38 × 15 =
26. 26.28 × 75 =
27. 27.45 × 30 =
28. 28.8 × 65 =
29. 29.25 × 20 =
30. 30.15 × 28 =
31. 31.55 × 34 =
32. 32.20 × 65 =
33. 33.35 × 18 =
34. 34.75 × 34 =
35. 35.75 × 8 =
36. 36.28 × 15 =
37. 37.10 × 125 =
38. 38.35 × 40 =
39. 39.75 × 34 =
40. 40.16 × 55 =

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