Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 427 · 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. 1.36 × 125 =
2. 2.15 × 10 =
3. 3.10 × 35 =
4. 4.28 × 45 =
5. 5.45 × 28 =
6. 6.15 × 12 =
7. 7.45 × 18 =
8. 8.8 × 45 =
9. 9.55 × 24 =
10. 10.20 × 25 =
11. 11.26 × 125 =
12. 12.15 × 40 =
13. 13.24 × 15 =
14. 14.34 × 75 =
15. 15.40 × 15 =
16. 16.75 × 20 =
17. 17.36 × 25 =
18. 18.35 × 30 =
19. 19.14 × 125 =
20. 20.38 × 55 =
21. 21.20 × 15 =
22. 22.35 × 26 =
23. 23.8 × 45 =
24. 24.125 × 20 =
25. 25.28 × 35 =
26. 26.25 × 22 =
27. 27.25 × 14 =
28. 28.25 × 38 =
29. 29.45 × 18 =
30. 30.28 × 75 =
31. 31.34 × 125 =
32. 32.45 × 10 =
33. 33.36 × 125 =
34. 34.35 × 16 =
35. 35.35 × 10 =
36. 36.18 × 125 =
37. 37.35 × 16 =
38. 38.15 × 24 =
39. 39.25 × 34 =
40. 40.45 × 14 =

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