Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 213 · 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. 1.45 × 14 =
2. 2.65 × 26 =
3. 3.26 × 35 =
4. 4.125 × 18 =
5. 5.25 × 30 =
6. 6.125 × 38 =
7. 7.8 × 55 =
8. 8.15 × 14 =
9. 9.15 × 16 =
10. 10.125 × 28 =
11. 11.10 × 35 =
12. 12.35 × 8 =
13. 13.15 × 34 =
14. 14.35 × 38 =
15. 15.8 × 65 =
16. 16.65 × 12 =
17. 17.35 × 12 =
18. 18.35 × 8 =
19. 19.35 × 16 =
20. 20.55 × 10 =
21. 21.25 × 10 =
22. 22.15 × 16 =
23. 23.15 × 6 =
24. 24.26 × 25 =
25. 25.24 × 55 =
26. 26.10 × 45 =
27. 27.20 × 55 =
28. 28.15 × 30 =
29. 29.35 × 12 =
30. 30.65 × 14 =
31. 31.25 × 14 =
32. 32.15 × 12 =
33. 33.65 × 32 =
34. 34.8 × 55 =
35. 35.24 × 55 =
36. 36.6 × 35 =
37. 37.34 × 75 =
38. 38.25 × 14 =
39. 39.22 × 45 =
40. 40.15 × 26 =

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