Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 731 · 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. 1.1.9 × 3.4 — where does the decimal point go? (a) 0.0646 (b) 6.46 (c) 64.6 (d) 0.646
2. 2.2.4 × 8 — where does the decimal point go? (a) 192 (b) 0.192 (c) 19.2 (d) 1.92
3. 3.0.92 × 8 — where does the decimal point go? (a) 0.0736 (b) 0.736 (c) 73.6 (d) 7.36
4. 4.3.8 × 36 — where does the decimal point go? (a) 1368 (b) 13.68 (c) 136.8 (d) 1.368
5. 5.0.16 × 9 — where does the decimal point go? (a) 1.44 (b) 0.0144 (c) 14.4 (d) 0.144
6. 6.4.3 × 5 — where does the decimal point go? (a) 0.215 (b) 2.15 (c) 21.5 (d) 215
7. 7.0.88 × 2 — where does the decimal point go? (a) 0.0176 (b) 1.76 (c) 0.176 (d) 17.6
8. 8.0.64 × 0.2 — where does the decimal point go? (a) 1.28 (b) 0.0128 (c) 0.00128 (d) 0.128
9. 9.6.6 × 8 — where does the decimal point go? (a) 528 (b) 52.8 (c) 0.528 (d) 5.28
10. 10.6.7 × 4 — where does the decimal point go? (a) 26.8 (b) 268 (c) 2.68 (d) 0.268
11. 11.2.8 × 6 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
12. 12.7.2 × 22 — where does the decimal point go? (a) 158.4 (b) 15.84 (c) 1584 (d) 1.584
13. 13.0.16 × 49 — where does the decimal point go? (a) 78.4 (b) 0.0784 (c) 0.784 (d) 7.84
14. 14.0.27 × 19 — where does the decimal point go? (a) 5.13 (b) 0.513 (c) 51.3 (d) 0.0513
15. 15.0.59 × 39 — where does the decimal point go? (a) 23.01 (b) 2.301 (c) 0.2301 (d) 230.1
16. 16.2.4 × 0.8 — where does the decimal point go? (a) 1.92 (b) 0.192 (c) 0.0192 (d) 19.2
17. 17.0.44 × 4 — where does the decimal point go? (a) 0.0176 (b) 17.6 (c) 1.76 (d) 0.176
18. 18.2.3 × 12 — where does the decimal point go? (a) 27.6 (b) 0.276 (c) 2.76 (d) 276
19. 19.0.87 × 0.7 — where does the decimal point go? (a) 0.00609 (b) 0.0609 (c) 6.09 (d) 0.609
20. 20.0.44 × 0.9 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 0.00396 (d) 0.0396
21. 21.2.1 × 2.1 — where does the decimal point go? (a) 44.1 (b) 0.0441 (c) 0.441 (d) 4.41
22. 22.0.97 × 3 — where does the decimal point go? (a) 0.0291 (b) 0.291 (c) 2.91 (d) 29.1
23. 23.8.1 × 4.4 — where does the decimal point go? (a) 0.3564 (b) 3.564 (c) 35.64 (d) 356.4
24. 24.0.86 × 14 — where does the decimal point go? (a) 0.1204 (b) 12.04 (c) 1.204 (d) 120.4
25. 25.3.7 × 13 — where does the decimal point go? (a) 48.1 (b) 0.481 (c) 481 (d) 4.81
26. 26.1.8 × 0.2 — where does the decimal point go? (a) 0.36 (b) 0.0036 (c) 3.6 (d) 0.036
27. 27.9.3 × 2.7 — where does the decimal point go? (a) 25.11 (b) 251.1 (c) 2.511 (d) 0.2511
28. 28.3.3 × 3.8 — where does the decimal point go? (a) 0.1254 (b) 1.254 (c) 12.54 (d) 125.4
29. 29.6.4 × 46 — where does the decimal point go? (a) 29.44 (b) 2944 (c) 294.4 (d) 2.944
30. 30.3.8 × 16 — where does the decimal point go? (a) 0.608 (b) 608 (c) 60.8 (d) 6.08
31. 31.3.1 × 2.1 — where does the decimal point go? (a) 6.51 (b) 65.1 (c) 0.651 (d) 0.0651
32. 32.0.33 × 43 — where does the decimal point go? (a) 1.419 (b) 14.19 (c) 0.1419 (d) 141.9
33. 33.2.9 × 5 — where does the decimal point go? (a) 14.5 (b) 145 (c) 1.45 (d) 0.145
34. 34.0.62 × 3 — where does the decimal point go? (a) 1.86 (b) 18.6 (c) 0.0186 (d) 0.186
35. 35.8.2 × 44 — where does the decimal point go? (a) 36.08 (b) 3608 (c) 360.8 (d) 3.608
36. 36.2.1 × 2 — where does the decimal point go? (a) 4.2 (b) 0.042 (c) 0.42 (d) 42
37. 37.6.5 × 39 — where does the decimal point go? (a) 25.35 (b) 2535 (c) 2.535 (d) 253.5
38. 38.0.98 × 0.6 — where does the decimal point go? (a) 5.88 (b) 0.0588 (c) 0.00588 (d) 0.588
39. 39.0.61 × 3.8 — where does the decimal point go? (a) 2.318 (b) 0.02318 (c) 23.18 (d) 0.2318
40. 40.0.12 × 4.1 — where does the decimal point go? (a) 0.00492 (b) 4.92 (c) 0.492 (d) 0.0492

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