Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 188 · 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 × 30 =
2. 2.12 × 25 =
3. 3.25 × 36 =
4. 4.75 × 12 =
5. 5.55 × 12 =
6. 6.30 × 75 =
7. 7.75 × 30 =
8. 8.45 × 20 =
9. 9.18 × 35 =
10. 10.75 × 26 =
11. 11.8 × 55 =
12. 12.35 × 38 =
13. 13.22 × 35 =
14. 14.22 × 35 =
15. 15.35 × 34 =
16. 16.45 × 16 =
17. 17.26 × 55 =
18. 18.55 × 12 =
19. 19.20 × 15 =
20. 20.25 × 16 =
21. 21.32 × 65 =
22. 22.28 × 25 =
23. 23.38 × 55 =
24. 24.28 × 125 =
25. 25.75 × 10 =
26. 26.25 × 10 =
27. 27.25 × 28 =
28. 28.15 × 8 =
29. 29.15 × 16 =
30. 30.65 × 22 =
31. 31.75 × 6 =
32. 32.15 × 34 =
33. 33.75 × 34 =
34. 34.55 × 38 =
35. 35.20 × 35 =
36. 36.45 × 32 =
37. 37.30 × 25 =
38. 38.15 × 12 =
39. 39.35 × 12 =
40. 40.65 × 20 =

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