Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 616 · 40 questions

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

1. 1.6.4 × 32 — where does the decimal point go? (a) 2048 (b) 2.048 (c) 20.48 (d) 204.8
2. 2.5.7 × 0.8 — where does the decimal point go? (a) 0.456 (b) 4.56 (c) 0.0456 (d) 45.6
3. 3.5.9 × 19 — where does the decimal point go? (a) 1121 (b) 11.21 (c) 1.121 (d) 112.1
4. 4.0.64 × 8 — where does the decimal point go? (a) 5.12 (b) 51.2 (c) 0.512 (d) 0.0512
5. 5.5.8 × 8 — where does the decimal point go? (a) 464 (b) 4.64 (c) 0.464 (d) 46.4
6. 6.1.7 × 6 — where does the decimal point go? (a) 10.2 (b) 102 (c) 0.102 (d) 1.02
7. 7.0.41 × 4.2 — where does the decimal point go? (a) 1.722 (b) 17.22 (c) 0.1722 (d) 0.01722
8. 8.3.8 × 29 — where does the decimal point go? (a) 110.2 (b) 11.02 (c) 1.102 (d) 1102
9. 9.2.6 × 3.2 — where does the decimal point go? (a) 8.32 (b) 0.832 (c) 0.0832 (d) 83.2
10. 10.7.1 × 0.7 — where does the decimal point go? (a) 4.97 (b) 0.0497 (c) 49.7 (d) 0.497
11. 11.0.47 × 0.5 — where does the decimal point go? (a) 0.00235 (b) 2.35 (c) 0.0235 (d) 0.235
12. 12.8.1 × 1.1 — where does the decimal point go? (a) 0.0891 (b) 8.91 (c) 0.891 (d) 89.1
13. 13.4.6 × 7 — where does the decimal point go? (a) 32.2 (b) 322 (c) 3.22 (d) 0.322
14. 14.1.6 × 46 — where does the decimal point go? (a) 0.736 (b) 736 (c) 7.36 (d) 73.6
15. 15.0.17 × 0.5 — where does the decimal point go? (a) 0.0085 (b) 0.85 (c) 0.085 (d) 0.00085
16. 16.0.16 × 0.6 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.00096 (d) 0.096
17. 17.0.31 × 0.7 — where does the decimal point go? (a) 0.217 (b) 0.00217 (c) 2.17 (d) 0.0217
18. 18.8.6 × 7 — where does the decimal point go? (a) 60.2 (b) 6.02 (c) 0.602 (d) 602
19. 19.0.27 × 1.3 — where does the decimal point go? (a) 0.00351 (b) 3.51 (c) 0.351 (d) 0.0351
20. 20.3.4 × 8 — where does the decimal point go? (a) 272 (b) 27.2 (c) 0.272 (d) 2.72
21. 21.8.8 × 4 — where does the decimal point go? (a) 35.2 (b) 3.52 (c) 0.352 (d) 352
22. 22.0.39 × 22 — where does the decimal point go? (a) 0.0858 (b) 0.858 (c) 85.8 (d) 8.58
23. 23.2.2 × 0.9 — where does the decimal point go? (a) 0.0198 (b) 19.8 (c) 0.198 (d) 1.98
24. 24.0.28 × 4 — where does the decimal point go? (a) 11.2 (b) 0.112 (c) 0.0112 (d) 1.12
25. 25.0.99 × 0.3 — where does the decimal point go? (a) 0.297 (b) 0.0297 (c) 2.97 (d) 0.00297
26. 26.0.34 × 0.9 — where does the decimal point go? (a) 0.00306 (b) 0.306 (c) 3.06 (d) 0.0306
27. 27.7.8 × 3 — where does the decimal point go? (a) 2.34 (b) 0.234 (c) 23.4 (d) 234
28. 28.0.12 × 3.1 — where does the decimal point go? (a) 0.00372 (b) 0.0372 (c) 3.72 (d) 0.372
29. 29.2.4 × 0.4 — where does the decimal point go? (a) 0.0096 (b) 9.6 (c) 0.096 (d) 0.96
30. 30.0.14 × 2 — where does the decimal point go? (a) 0.0028 (b) 0.28 (c) 0.028 (d) 2.8
31. 31.6.9 × 4.8 — where does the decimal point go? (a) 3.312 (b) 331.2 (c) 0.3312 (d) 33.12
32. 32.0.64 × 22 — where does the decimal point go? (a) 14.08 (b) 1.408 (c) 140.8 (d) 0.1408
33. 33.0.28 × 0.6 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 1.68 (d) 0.00168
34. 34.4.1 × 0.4 — where does the decimal point go? (a) 0.0164 (b) 1.64 (c) 0.164 (d) 16.4
35. 35.0.19 × 31 — where does the decimal point go? (a) 5.89 (b) 0.0589 (c) 0.589 (d) 58.9
36. 36.0.72 × 7 — where does the decimal point go? (a) 0.0504 (b) 50.4 (c) 5.04 (d) 0.504
37. 37.0.69 × 2 — where does the decimal point go? (a) 0.0138 (b) 0.138 (c) 13.8 (d) 1.38
38. 38.0.15 × 4.3 — where does the decimal point go? (a) 0.0645 (b) 0.645 (c) 6.45 (d) 0.00645
39. 39.4.1 × 48 — where does the decimal point go? (a) 19.68 (b) 1968 (c) 1.968 (d) 196.8
40. 40.1.4 × 0.9 — where does the decimal point go? (a) 12.6 (b) 0.0126 (c) 0.126 (d) 1.26

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