Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 54 · 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. 1.35 × 36 =
2. 2.75 × 22 =
3. 3.25 × 38 =
4. 4.8 × 25 =
5. 5.75 × 20 =
6. 6.40 × 25 =
7. 7.24 × 55 =
8. 8.15 × 12 =
9. 9.75 × 36 =
10. 10.125 × 14 =
11. 11.55 × 22 =
12. 12.65 × 30 =
13. 13.45 × 10 =
14. 14.18 × 35 =
15. 15.125 × 8 =
16. 16.55 × 28 =
17. 17.30 × 45 =
18. 18.45 × 16 =
19. 19.55 × 38 =
20. 20.55 × 28 =
21. 21.22 × 75 =
22. 22.25 × 40 =
23. 23.15 × 24 =
24. 24.10 × 45 =
25. 25.55 × 16 =
26. 26.26 × 75 =
27. 27.125 × 10 =
28. 28.75 × 34 =
29. 29.125 × 34 =
30. 30.10 × 75 =
31. 31.35 × 14 =
32. 32.26 × 25 =
33. 33.15 × 14 =
34. 34.36 × 125 =
35. 35.20 × 65 =
36. 36.15 × 32 =
37. 37.10 × 75 =
38. 38.36 × 125 =
39. 39.36 × 25 =
40. 40.125 × 14 =

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