Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 87 · 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. 1.38 × 25 =
2. 2.14 × 35 =
3. 3.15 × 34 =
4. 4.35 × 24 =
5. 5.38 × 75 =
6. 6.35 × 24 =
7. 7.14 × 45 =
8. 8.30 × 15 =
9. 9.125 × 36 =
10. 10.65 × 18 =
11. 11.35 × 40 =
12. 12.20 × 45 =
13. 13.16 × 55 =
14. 14.15 × 10 =
15. 15.25 × 36 =
16. 16.26 × 55 =
17. 17.125 × 24 =
18. 18.65 × 6 =
19. 19.25 × 34 =
20. 20.75 × 10 =
21. 21.15 × 16 =
22. 22.14 × 25 =
23. 23.24 × 55 =
24. 24.35 × 30 =
25. 25.25 × 30 =
26. 26.55 × 6 =
27. 27.26 × 35 =
28. 28.125 × 24 =
29. 29.40 × 65 =
30. 30.65 × 10 =
31. 31.10 × 45 =
32. 32.22 × 25 =
33. 33.18 × 55 =
34. 34.16 × 35 =
35. 35.38 × 65 =
36. 36.22 × 65 =
37. 37.25 × 36 =
38. 38.20 × 125 =
39. 39.35 × 36 =
40. 40.22 × 45 =

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