Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 436 · 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 × 40 =
2. 2.38 × 35 =
3. 3.15 × 24 =
4. 4.38 × 25 =
5. 5.38 × 125 =
6. 6.25 × 18 =
7. 7.35 × 6 =
8. 8.36 × 25 =
9. 9.55 × 12 =
10. 10.36 × 25 =
11. 11.35 × 22 =
12. 12.10 × 35 =
13. 13.125 × 22 =
14. 14.25 × 32 =
15. 15.65 × 14 =
16. 16.14 × 125 =
17. 17.36 × 55 =
18. 18.15 × 28 =
19. 19.75 × 12 =
20. 20.10 × 75 =
21. 21.65 × 28 =
22. 22.20 × 15 =
23. 23.6 × 125 =
24. 24.35 × 22 =
25. 25.8 × 75 =
26. 26.45 × 12 =
27. 27.55 × 22 =
28. 28.15 × 28 =
29. 29.10 × 45 =
30. 30.35 × 18 =
31. 31.55 × 20 =
32. 32.65 × 10 =
33. 33.22 × 65 =
34. 34.25 × 38 =
35. 35.45 × 16 =
36. 36.15 × 30 =
37. 37.22 × 35 =
38. 38.35 × 6 =
39. 39.40 × 75 =
40. 40.25 × 40 =

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