Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 144 · 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. 1.75 × 22 =
2. 2.20 × 25 =
3. 3.65 × 8 =
4. 4.12 × 125 =
5. 5.45 × 22 =
6. 6.18 × 35 =
7. 7.26 × 35 =
8. 8.38 × 15 =
9. 9.36 × 35 =
10. 10.55 × 14 =
11. 11.125 × 32 =
12. 12.8 × 125 =
13. 13.20 × 35 =
14. 14.125 × 10 =
15. 15.65 × 16 =
16. 16.125 × 26 =
17. 17.15 × 18 =
18. 18.40 × 35 =
19. 19.65 × 16 =
20. 20.25 × 26 =
21. 21.35 × 18 =
22. 22.32 × 65 =
23. 23.15 × 32 =
24. 24.65 × 12 =
25. 25.32 × 75 =
26. 26.10 × 75 =
27. 27.12 × 55 =
28. 28.8 × 125 =
29. 29.75 × 14 =
30. 30.34 × 55 =
31. 31.15 × 10 =
32. 32.26 × 25 =
33. 33.15 × 22 =
34. 34.34 × 55 =
35. 35.15 × 6 =
36. 36.25 × 32 =
37. 37.55 × 10 =
38. 38.45 × 28 =
39. 39.20 × 45 =
40. 40.35 × 24 =

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