Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 83 · 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. 1.9.3 × 49 — where does the decimal point go? (a) 45.57 (b) 455.7 (c) 4.557 (d) 4557
2. 2.0.94 × 0.2 — where does the decimal point go? (a) 1.88 (b) 0.188 (c) 0.0188 (d) 0.00188
3. 3.4.1 × 14 — where does the decimal point go? (a) 5.74 (b) 0.574 (c) 574 (d) 57.4
4. 4.5.8 × 0.6 — where does the decimal point go? (a) 0.0348 (b) 34.8 (c) 0.348 (d) 3.48
5. 5.6.7 × 0.2 — where does the decimal point go? (a) 1.34 (b) 13.4 (c) 0.134 (d) 0.0134
6. 6.7.6 × 24 — where does the decimal point go? (a) 1824 (b) 18.24 (c) 1.824 (d) 182.4
7. 7.0.89 × 3 — where does the decimal point go? (a) 2.67 (b) 0.0267 (c) 0.267 (d) 26.7
8. 8.1.3 × 44 — where does the decimal point go? (a) 57.2 (b) 0.572 (c) 572 (d) 5.72
9. 9.9.7 × 3 — where does the decimal point go? (a) 0.291 (b) 291 (c) 2.91 (d) 29.1
10. 10.9.6 × 0.9 — where does the decimal point go? (a) 86.4 (b) 0.864 (c) 0.0864 (d) 8.64
11. 11.0.89 × 8 — where does the decimal point go? (a) 71.2 (b) 0.0712 (c) 7.12 (d) 0.712
12. 12.0.28 × 18 — where does the decimal point go? (a) 0.0504 (b) 50.4 (c) 5.04 (d) 0.504
13. 13.0.35 × 7 — where does the decimal point go? (a) 0.0245 (b) 2.45 (c) 0.245 (d) 24.5
14. 14.7.4 × 4 — where does the decimal point go? (a) 0.296 (b) 29.6 (c) 2.96 (d) 296
15. 15.5.8 × 0.3 — where does the decimal point go? (a) 17.4 (b) 0.174 (c) 1.74 (d) 0.0174
16. 16.0.41 × 2.6 — where does the decimal point go? (a) 1.066 (b) 0.1066 (c) 0.01066 (d) 10.66
17. 17.0.49 × 13 — where does the decimal point go? (a) 6.37 (b) 0.637 (c) 0.0637 (d) 63.7
18. 18.8.9 × 2.7 — where does the decimal point go? (a) 2.403 (b) 240.3 (c) 0.2403 (d) 24.03
19. 19.3.8 × 2 — where does the decimal point go? (a) 76 (b) 7.6 (c) 0.076 (d) 0.76
20. 20.9.9 × 0.2 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 19.8 (d) 0.0198
21. 21.0.27 × 16 — where does the decimal point go? (a) 0.432 (b) 0.0432 (c) 4.32 (d) 43.2
22. 22.3.9 × 45 — where does the decimal point go? (a) 17.55 (b) 1755 (c) 1.755 (d) 175.5
23. 23.0.43 × 12 — where does the decimal point go? (a) 5.16 (b) 0.0516 (c) 51.6 (d) 0.516
24. 24.1.3 × 0.6 — where does the decimal point go? (a) 0.78 (b) 0.0078 (c) 7.8 (d) 0.078
25. 25.0.78 × 2 — where does the decimal point go? (a) 1.56 (b) 15.6 (c) 0.0156 (d) 0.156
26. 26.8.2 × 0.7 — where does the decimal point go? (a) 0.574 (b) 57.4 (c) 0.0574 (d) 5.74
27. 27.0.16 × 0.7 — where does the decimal point go? (a) 0.0112 (b) 1.12 (c) 0.112 (d) 0.00112
28. 28.0.16 × 8 — where does the decimal point go? (a) 0.128 (b) 1.28 (c) 12.8 (d) 0.0128
29. 29.8.1 × 0.2 — where does the decimal point go? (a) 0.162 (b) 16.2 (c) 0.0162 (d) 1.62
30. 30.0.41 × 4.3 — where does the decimal point go? (a) 0.01763 (b) 17.63 (c) 1.763 (d) 0.1763
31. 31.9.3 × 36 — where does the decimal point go? (a) 3348 (b) 33.48 (c) 3.348 (d) 334.8
32. 32.0.17 × 0.2 — where does the decimal point go? (a) 0.0034 (b) 0.34 (c) 0.034 (d) 0.00034
33. 33.1.9 × 7 — where does the decimal point go? (a) 133 (b) 1.33 (c) 0.133 (d) 13.3
34. 34.2.1 × 5 — where does the decimal point go? (a) 10.5 (b) 0.105 (c) 105 (d) 1.05
35. 35.5.8 × 3 — where does the decimal point go? (a) 1.74 (b) 17.4 (c) 174 (d) 0.174
36. 36.0.86 × 4 — where does the decimal point go? (a) 0.344 (b) 0.0344 (c) 34.4 (d) 3.44
37. 37.3.7 × 3 — where does the decimal point go? (a) 11.1 (b) 0.111 (c) 111 (d) 1.11
38. 38.2.3 × 43 — where does the decimal point go? (a) 9.89 (b) 98.9 (c) 0.989 (d) 989
39. 39.4.3 × 36 — where does the decimal point go? (a) 1.548 (b) 15.48 (c) 1548 (d) 154.8
40. 40.0.33 × 0.5 — where does the decimal point go? (a) 0.0165 (b) 0.00165 (c) 1.65 (d) 0.165

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