Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 771 · 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. 1.36 × 25 =
2. 2.6 × 35 =
3. 3.26 × 35 =
4. 4.35 × 18 =
5. 5.30 × 65 =
6. 6.65 × 14 =
7. 7.15 × 8 =
8. 8.55 × 14 =
9. 9.40 × 125 =
10. 10.30 × 125 =
11. 11.35 × 22 =
12. 12.25 × 10 =
13. 13.35 × 12 =
14. 14.45 × 10 =
15. 15.16 × 55 =
16. 16.25 × 18 =
17. 17.8 × 35 =
18. 18.75 × 8 =
19. 19.26 × 45 =
20. 20.34 × 25 =
21. 21.12 × 25 =
22. 22.34 × 75 =
23. 23.25 × 8 =
24. 24.26 × 125 =
25. 25.32 × 25 =
26. 26.10 × 55 =
27. 27.35 × 10 =
28. 28.36 × 25 =
29. 29.35 × 18 =
30. 30.125 × 12 =
31. 31.12 × 25 =
32. 32.125 × 6 =
33. 33.40 × 45 =
34. 34.40 × 65 =
35. 35.28 × 45 =
36. 36.15 × 18 =
37. 37.65 × 36 =
38. 38.24 × 25 =
39. 39.28 × 65 =
40. 40.125 × 22 =

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