Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 901 · 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. 1.125 × 18 =
2. 2.55 × 38 =
3. 3.22 × 45 =
4. 4.30 × 35 =
5. 5.28 × 65 =
6. 6.125 × 36 =
7. 7.36 × 45 =
8. 8.125 × 24 =
9. 9.15 × 40 =
10. 10.26 × 65 =
11. 11.65 × 24 =
12. 12.16 × 45 =
13. 13.75 × 14 =
14. 14.55 × 26 =
15. 15.32 × 55 =
16. 16.28 × 15 =
17. 17.14 × 65 =
18. 18.125 × 32 =
19. 19.75 × 26 =
20. 20.25 × 6 =
21. 21.35 × 10 =
22. 22.14 × 25 =
23. 23.15 × 8 =
24. 24.75 × 38 =
25. 25.14 × 55 =
26. 26.35 × 20 =
27. 27.75 × 30 =
28. 28.20 × 65 =
29. 29.35 × 12 =
30. 30.15 × 32 =
31. 31.25 × 10 =
32. 32.35 × 34 =
33. 33.55 × 10 =
34. 34.125 × 26 =
35. 35.8 × 25 =
36. 36.32 × 65 =
37. 37.26 × 65 =
38. 38.15 × 6 =
39. 39.28 × 75 =
40. 40.15 × 38 =

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