Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 818 · 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. 2.14 × 55 =
3. 3.22 × 15 =
4. 4.40 × 55 =
5. 5.25 × 12 =
6. 6.32 × 45 =
7. 7.15 × 26 =
8. 8.35 × 34 =
9. 9.65 × 22 =
10. 10.26 × 45 =
11. 11.36 × 35 =
12. 12.14 × 125 =
13. 13.35 × 8 =
14. 14.16 × 65 =
15. 15.125 × 22 =
16. 16.15 × 26 =
17. 17.55 × 18 =
18. 18.35 × 40 =
19. 19.34 × 125 =
20. 20.45 × 36 =
21. 21.65 × 28 =
22. 22.32 × 45 =
23. 23.75 × 22 =
24. 24.20 × 125 =
25. 25.25 × 22 =
26. 26.24 × 125 =
27. 27.24 × 125 =
28. 28.55 × 22 =
29. 29.75 × 8 =
30. 30.20 × 65 =
31. 31.8 × 65 =
32. 32.8 × 15 =
33. 33.14 × 125 =
34. 34.35 × 30 =
35. 35.125 × 18 =
36. 36.20 × 25 =
37. 37.75 × 38 =
38. 38.125 × 24 =
39. 39.35 × 8 =
40. 40.10 × 45 =

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