Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 746 · 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 × 28 =
2. 2.55 × 38 =
3. 3.18 × 55 =
4. 4.35 × 22 =
5. 5.45 × 34 =
6. 6.45 × 20 =
7. 7.12 × 65 =
8. 8.15 × 18 =
9. 9.35 × 12 =
10. 10.34 × 125 =
11. 11.22 × 125 =
12. 12.55 × 18 =
13. 13.55 × 10 =
14. 14.22 × 25 =
15. 15.12 × 75 =
16. 16.20 × 45 =
17. 17.12 × 25 =
18. 18.12 × 125 =
19. 19.15 × 20 =
20. 20.125 × 32 =
21. 21.10 × 125 =
22. 22.35 × 10 =
23. 23.10 × 75 =
24. 24.40 × 25 =
25. 25.28 × 125 =
26. 26.45 × 12 =
27. 27.55 × 34 =
28. 28.35 × 40 =
29. 29.65 × 36 =
30. 30.14 × 25 =
31. 31.55 × 34 =
32. 32.30 × 15 =
33. 33.65 × 20 =
34. 34.38 × 55 =
35. 35.20 × 35 =
36. 36.35 × 6 =
37. 37.75 × 24 =
38. 38.35 × 16 =
39. 39.35 × 32 =
40. 40.65 × 32 =

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