Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 807 · 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. 1.14 × 55 =
2. 2.15 × 26 =
3. 3.6 × 15 =
4. 4.55 × 38 =
5. 5.75 × 10 =
6. 6.75 × 18 =
7. 7.14 × 25 =
8. 8.14 × 65 =
9. 9.55 × 30 =
10. 10.10 × 125 =
11. 11.55 × 20 =
12. 12.35 × 40 =
13. 13.34 × 15 =
14. 14.38 × 25 =
15. 15.8 × 15 =
16. 16.26 × 65 =
17. 17.10 × 125 =
18. 18.65 × 24 =
19. 19.55 × 36 =
20. 20.15 × 8 =
21. 21.14 × 125 =
22. 22.55 × 24 =
23. 23.25 × 36 =
24. 24.65 × 40 =
25. 25.34 × 25 =
26. 26.15 × 16 =
27. 27.55 × 6 =
28. 28.65 × 34 =
29. 29.25 × 38 =
30. 30.16 × 65 =
31. 31.14 × 25 =
32. 32.15 × 8 =
33. 33.75 × 10 =
34. 34.14 × 15 =
35. 35.65 × 36 =
36. 36.35 × 30 =
37. 37.25 × 32 =
38. 38.25 × 6 =
39. 39.65 × 10 =
40. 40.16 × 25 =

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