Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 857 · 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. 1.35 × 8 =
2. 2.32 × 65 =
3. 3.14 × 125 =
4. 4.35 × 40 =
5. 5.10 × 15 =
6. 6.125 × 40 =
7. 7.34 × 45 =
8. 8.36 × 125 =
9. 9.125 × 14 =
10. 10.55 × 34 =
11. 11.26 × 35 =
12. 12.35 × 40 =
13. 13.75 × 34 =
14. 14.125 × 12 =
15. 15.16 × 35 =
16. 16.25 × 40 =
17. 17.18 × 75 =
18. 18.55 × 30 =
19. 19.40 × 75 =
20. 20.25 × 18 =
21. 21.6 × 125 =
22. 22.12 × 75 =
23. 23.22 × 25 =
24. 24.25 × 14 =
25. 25.45 × 38 =
26. 26.6 × 35 =
27. 27.35 × 18 =
28. 28.55 × 34 =
29. 29.8 × 15 =
30. 30.45 × 18 =
31. 31.35 × 40 =
32. 32.12 × 25 =
33. 33.12 × 55 =
34. 34.24 × 35 =
35. 35.55 × 6 =
36. 36.32 × 75 =
37. 37.18 × 55 =
38. 38.125 × 38 =
39. 39.38 × 65 =
40. 40.26 × 125 =

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