Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 205 · 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 × 35 =
2. 2.38 × 35 =
3. 3.15 × 12 =
4. 4.10 × 35 =
5. 5.75 × 8 =
6. 6.36 × 55 =
7. 7.10 × 35 =
8. 8.15 × 16 =
9. 9.20 × 125 =
10. 10.6 × 35 =
11. 11.10 × 75 =
12. 12.28 × 15 =
13. 13.10 × 15 =
14. 14.15 × 38 =
15. 15.35 × 34 =
16. 16.55 × 24 =
17. 17.36 × 15 =
18. 18.10 × 45 =
19. 19.125 × 20 =
20. 20.34 × 15 =
21. 21.75 × 38 =
22. 22.35 × 40 =
23. 23.32 × 75 =
24. 24.65 × 38 =
25. 25.75 × 10 =
26. 26.30 × 25 =
27. 27.24 × 25 =
28. 28.15 × 18 =
29. 29.125 × 10 =
30. 30.45 × 10 =
31. 31.28 × 15 =
32. 32.15 × 18 =
33. 33.34 × 75 =
34. 34.125 × 24 =
35. 35.20 × 75 =
36. 36.28 × 75 =
37. 37.28 × 75 =
38. 38.25 × 26 =
39. 39.28 × 15 =
40. 40.40 × 55 =

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