Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 108 · 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 × 30 =
2. 2.25 × 26 =
3. 3.55 × 34 =
4. 4.34 × 75 =
5. 5.36 × 15 =
6. 6.75 × 12 =
7. 7.15 × 8 =
8. 8.25 × 16 =
9. 9.10 × 55 =
10. 10.75 × 20 =
11. 11.75 × 6 =
12. 12.12 × 15 =
13. 13.28 × 125 =
14. 14.40 × 55 =
15. 15.8 × 15 =
16. 16.55 × 24 =
17. 17.15 × 10 =
18. 18.32 × 55 =
19. 19.30 × 125 =
20. 20.32 × 65 =
21. 21.34 × 35 =
22. 22.15 × 8 =
23. 23.36 × 55 =
24. 24.26 × 25 =
25. 25.10 × 25 =
26. 26.18 × 15 =
27. 27.65 × 26 =
28. 28.24 × 65 =
29. 29.24 × 75 =
30. 30.36 × 125 =
31. 31.35 × 12 =
32. 32.14 × 65 =
33. 33.65 × 18 =
34. 34.45 × 22 =
35. 35.25 × 34 =
36. 36.12 × 125 =
37. 37.15 × 12 =
38. 38.34 × 35 =
39. 39.15 × 12 =
40. 40.65 × 18 =

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