Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 350 · 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. 1.75 × 26 =
2. 2.22 × 65 =
3. 3.15 × 26 =
4. 4.12 × 55 =
5. 5.15 × 30 =
6. 6.125 × 10 =
7. 7.8 × 35 =
8. 8.25 × 40 =
9. 9.125 × 16 =
10. 10.55 × 28 =
11. 11.75 × 38 =
12. 12.24 × 65 =
13. 13.55 × 10 =
14. 14.26 × 45 =
15. 15.34 × 125 =
16. 16.30 × 35 =
17. 17.10 × 125 =
18. 18.16 × 65 =
19. 19.10 × 45 =
20. 20.75 × 36 =
21. 21.22 × 125 =
22. 22.18 × 65 =
23. 23.75 × 12 =
24. 24.125 × 32 =
25. 25.15 × 30 =
26. 26.65 × 22 =
27. 27.45 × 34 =
28. 28.35 × 12 =
29. 29.75 × 12 =
30. 30.34 × 25 =
31. 31.45 × 8 =
32. 32.26 × 35 =
33. 33.18 × 75 =
34. 34.14 × 65 =
35. 35.25 × 26 =
36. 36.25 × 16 =
37. 37.32 × 35 =
38. 38.45 × 30 =
39. 39.20 × 125 =
40. 40.32 × 15 =

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