Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 695 · 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. 1.22 × 75 =
2. 2.15 × 40 =
3. 3.55 × 12 =
4. 4.20 × 75 =
5. 5.40 × 35 =
6. 6.30 × 35 =
7. 7.25 × 14 =
8. 8.34 × 25 =
9. 9.45 × 22 =
10. 10.24 × 125 =
11. 11.25 × 30 =
12. 12.18 × 45 =
13. 13.20 × 125 =
14. 14.55 × 34 =
15. 15.34 × 45 =
16. 16.45 × 34 =
17. 17.16 × 75 =
18. 18.8 × 55 =
19. 19.36 × 25 =
20. 20.38 × 15 =
21. 21.25 × 32 =
22. 22.24 × 35 =
23. 23.34 × 75 =
24. 24.75 × 40 =
25. 25.20 × 125 =
26. 26.36 × 35 =
27. 27.6 × 65 =
28. 28.38 × 15 =
29. 29.25 × 40 =
30. 30.24 × 125 =
31. 31.40 × 35 =
32. 32.125 × 18 =
33. 33.22 × 15 =
34. 34.18 × 25 =
35. 35.14 × 45 =
36. 36.24 × 45 =
37. 37.28 × 25 =
38. 38.35 × 8 =
39. 39.26 × 35 =
40. 40.25 × 6 =

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