Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 621 · 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. 1.5.5 × 21 — where does the decimal point go? (a) 1155 (b) 1.155 (c) 115.5 (d) 11.55
2. 2.0.36 × 38 — where does the decimal point go? (a) 0.1368 (b) 13.68 (c) 1.368 (d) 136.8
3. 3.0.32 × 7 — where does the decimal point go? (a) 0.0224 (b) 0.224 (c) 2.24 (d) 22.4
4. 4.7.6 × 8 — where does the decimal point go? (a) 0.608 (b) 6.08 (c) 608 (d) 60.8
5. 5.0.51 × 4.9 — where does the decimal point go? (a) 24.99 (b) 2.499 (c) 0.02499 (d) 0.2499
6. 6.0.37 × 0.2 — where does the decimal point go? (a) 0.074 (b) 0.0074 (c) 0.00074 (d) 0.74
7. 7.0.23 × 8 — where does the decimal point go? (a) 1.84 (b) 0.0184 (c) 18.4 (d) 0.184
8. 8.1.3 × 0.7 — where does the decimal point go? (a) 0.0091 (b) 9.1 (c) 0.091 (d) 0.91
9. 9.0.42 × 36 — where does the decimal point go? (a) 0.1512 (b) 151.2 (c) 15.12 (d) 1.512
10. 10.0.74 × 6 — where does the decimal point go? (a) 4.44 (b) 0.444 (c) 0.0444 (d) 44.4
11. 11.3.7 × 0.3 — where does the decimal point go? (a) 1.11 (b) 0.0111 (c) 0.111 (d) 11.1
12. 12.9.6 × 0.3 — where does the decimal point go? (a) 28.8 (b) 0.288 (c) 0.0288 (d) 2.88
13. 13.7.4 × 3.6 — where does the decimal point go? (a) 26.64 (b) 2.664 (c) 0.2664 (d) 266.4
14. 14.0.28 × 4 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 0.0112 (d) 11.2
15. 15.0.29 × 6 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 17.4 (d) 0.0174
16. 16.9.4 × 36 — where does the decimal point go? (a) 338.4 (b) 3.384 (c) 3384 (d) 33.84
17. 17.8.7 × 47 — where does the decimal point go? (a) 4089 (b) 408.9 (c) 40.89 (d) 4.089
18. 18.9.2 × 4 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 368 (d) 0.368
19. 19.0.18 × 8 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 0.144 (d) 1.44
20. 20.6.9 × 0.6 — where does the decimal point go? (a) 0.414 (b) 4.14 (c) 0.0414 (d) 41.4
21. 21.0.69 × 0.2 — where does the decimal point go? (a) 0.00138 (b) 0.138 (c) 1.38 (d) 0.0138
22. 22.0.58 × 17 — where does the decimal point go? (a) 0.986 (b) 98.6 (c) 0.0986 (d) 9.86
23. 23.0.67 × 12 — where does the decimal point go? (a) 80.4 (b) 0.804 (c) 0.0804 (d) 8.04
24. 24.5.1 × 48 — where does the decimal point go? (a) 24.48 (b) 2.448 (c) 2448 (d) 244.8
25. 25.3.2 × 42 — where does the decimal point go? (a) 1344 (b) 1.344 (c) 134.4 (d) 13.44
26. 26.0.48 × 9 — where does the decimal point go? (a) 43.2 (b) 0.0432 (c) 4.32 (d) 0.432
27. 27.0.75 × 3 — where does the decimal point go? (a) 0.225 (b) 2.25 (c) 22.5 (d) 0.0225
28. 28.0.57 × 38 — where does the decimal point go? (a) 216.6 (b) 21.66 (c) 0.2166 (d) 2.166
29. 29.1.7 × 38 — where does the decimal point go? (a) 6.46 (b) 64.6 (c) 646 (d) 0.646
30. 30.0.17 × 17 — where does the decimal point go? (a) 0.0289 (b) 0.289 (c) 28.9 (d) 2.89
31. 31.3.9 × 2.9 — where does the decimal point go? (a) 113.1 (b) 1.131 (c) 0.1131 (d) 11.31
32. 32.0.37 × 0.5 — where does the decimal point go? (a) 0.0185 (b) 0.00185 (c) 0.185 (d) 1.85
33. 33.0.53 × 0.5 — where does the decimal point go? (a) 2.65 (b) 0.0265 (c) 0.00265 (d) 0.265
34. 34.0.31 × 49 — where does the decimal point go? (a) 15.19 (b) 1.519 (c) 0.1519 (d) 151.9
35. 35.4.3 × 1.2 — where does the decimal point go? (a) 0.516 (b) 5.16 (c) 0.0516 (d) 51.6
36. 36.8.4 × 0.7 — where does the decimal point go? (a) 0.0588 (b) 58.8 (c) 0.588 (d) 5.88
37. 37.5.1 × 5 — where does the decimal point go? (a) 2.55 (b) 25.5 (c) 0.255 (d) 255
38. 38.1.2 × 3 — where does the decimal point go? (a) 3.6 (b) 0.036 (c) 0.36 (d) 36
39. 39.5.6 × 26 — where does the decimal point go? (a) 14.56 (b) 1.456 (c) 145.6 (d) 1456
40. 40.6.7 × 17 — where does the decimal point go? (a) 1.139 (b) 11.39 (c) 1139 (d) 113.9

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