Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 788 · 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. 1.14 × 65 =
2. 2.65 × 22 =
3. 3.20 × 55 =
4. 4.8 × 25 =
5. 5.65 × 24 =
6. 6.6 × 35 =
7. 7.25 × 30 =
8. 8.14 × 25 =
9. 9.65 × 6 =
10. 10.25 × 34 =
11. 11.35 × 26 =
12. 12.35 × 36 =
13. 13.65 × 30 =
14. 14.12 × 125 =
15. 15.10 × 75 =
16. 16.30 × 45 =
17. 17.6 × 125 =
18. 18.125 × 40 =
19. 19.26 × 125 =
20. 20.14 × 65 =
21. 21.34 × 75 =
22. 22.36 × 25 =
23. 23.35 × 26 =
24. 24.18 × 35 =
25. 25.26 × 25 =
26. 26.65 × 38 =
27. 27.75 × 12 =
28. 28.15 × 12 =
29. 29.25 × 22 =
30. 30.125 × 16 =
31. 31.35 × 26 =
32. 32.14 × 125 =
33. 33.15 × 12 =
34. 34.45 × 18 =
35. 35.25 × 24 =
36. 36.15 × 10 =
37. 37.55 × 30 =
38. 38.15 × 20 =
39. 39.22 × 25 =
40. 40.25 × 14 =

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