Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 390 · 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 × 36 =
2. 2.24 × 45 =
3. 3.25 × 18 =
4. 4.32 × 55 =
5. 5.20 × 15 =
6. 6.34 × 125 =
7. 7.36 × 75 =
8. 8.35 × 10 =
9. 9.36 × 35 =
10. 10.26 × 125 =
11. 11.40 × 35 =
12. 12.25 × 22 =
13. 13.14 × 45 =
14. 14.75 × 32 =
15. 15.45 × 24 =
16. 16.22 × 15 =
17. 17.15 × 6 =
18. 18.34 × 45 =
19. 19.15 × 6 =
20. 20.25 × 40 =
21. 21.10 × 35 =
22. 22.18 × 25 =
23. 23.6 × 125 =
24. 24.14 × 125 =
25. 25.55 × 16 =
26. 26.10 × 35 =
27. 27.8 × 35 =
28. 28.34 × 65 =
29. 29.24 × 35 =
30. 30.24 × 35 =
31. 31.6 × 45 =
32. 32.15 × 38 =
33. 33.25 × 16 =
34. 34.75 × 26 =
35. 35.15 × 32 =
36. 36.75 × 14 =
37. 37.14 × 55 =
38. 38.35 × 34 =
39. 39.25 × 34 =
40. 40.25 × 36 =

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