Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 447 · 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. 1.30 × 35 =
2. 2.75 × 26 =
3. 3.14 × 35 =
4. 4.18 × 35 =
5. 5.35 × 36 =
6. 6.12 × 35 =
7. 7.25 × 10 =
8. 8.24 × 15 =
9. 9.25 × 20 =
10. 10.38 × 15 =
11. 11.18 × 35 =
12. 12.65 × 10 =
13. 13.45 × 12 =
14. 14.8 × 75 =
15. 15.34 × 45 =
16. 16.75 × 22 =
17. 17.65 × 40 =
18. 18.18 × 55 =
19. 19.16 × 65 =
20. 20.25 × 8 =
21. 21.12 × 125 =
22. 22.15 × 14 =
23. 23.15 × 12 =
24. 24.25 × 24 =
25. 25.35 × 38 =
26. 26.55 × 38 =
27. 27.38 × 35 =
28. 28.35 × 22 =
29. 29.45 × 12 =
30. 30.25 × 10 =
31. 31.16 × 45 =
32. 32.34 × 35 =
33. 33.25 × 16 =
34. 34.28 × 125 =
35. 35.24 × 55 =
36. 36.125 × 30 =
37. 37.14 × 15 =
38. 38.12 × 35 =
39. 39.45 × 8 =
40. 40.14 × 45 =

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