Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 277 · 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 × 22 =
2. 2.25 × 38 =
3. 3.35 × 8 =
4. 4.18 × 15 =
5. 5.75 × 26 =
6. 6.15 × 14 =
7. 7.15 × 40 =
8. 8.45 × 22 =
9. 9.35 × 6 =
10. 10.55 × 14 =
11. 11.35 × 24 =
12. 12.15 × 38 =
13. 13.55 × 24 =
14. 14.125 × 10 =
15. 15.34 × 15 =
16. 16.30 × 65 =
17. 17.75 × 14 =
18. 18.20 × 25 =
19. 19.34 × 35 =
20. 20.125 × 26 =
21. 21.35 × 10 =
22. 22.24 × 65 =
23. 23.36 × 25 =
24. 24.75 × 16 =
25. 25.16 × 25 =
26. 26.38 × 45 =
27. 27.25 × 32 =
28. 28.10 × 65 =
29. 29.36 × 65 =
30. 30.8 × 35 =
31. 31.25 × 26 =
32. 32.35 × 16 =
33. 33.25 × 30 =
34. 34.6 × 25 =
35. 35.8 × 45 =
36. 36.15 × 18 =
37. 37.75 × 20 =
38. 38.24 × 75 =
39. 39.65 × 36 =
40. 40.34 × 25 =

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