Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 259 · 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. 1.15 × 8 =
2. 2.36 × 45 =
3. 3.6 × 75 =
4. 4.26 × 45 =
5. 5.75 × 12 =
6. 6.45 × 30 =
7. 7.32 × 35 =
8. 8.20 × 125 =
9. 9.45 × 8 =
10. 10.28 × 65 =
11. 11.8 × 55 =
12. 12.28 × 15 =
13. 13.12 × 15 =
14. 14.45 × 28 =
15. 15.35 × 18 =
16. 16.15 × 28 =
17. 17.18 × 35 =
18. 18.35 × 26 =
19. 19.22 × 55 =
20. 20.16 × 55 =
21. 21.24 × 65 =
22. 22.10 × 125 =
23. 23.14 × 55 =
24. 24.55 × 40 =
25. 25.12 × 25 =
26. 26.15 × 30 =
27. 27.30 × 125 =
28. 28.34 × 75 =
29. 29.75 × 16 =
30. 30.65 × 24 =
31. 31.16 × 15 =
32. 32.125 × 38 =
33. 33.36 × 55 =
34. 34.65 × 24 =
35. 35.24 × 75 =
36. 36.36 × 25 =
37. 37.18 × 55 =
38. 38.65 × 16 =
39. 39.75 × 12 =
40. 40.30 × 15 =

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