Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 606 · 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. 1.5.4 × 3.9 — where does the decimal point go? (a) 21.06 (b) 210.6 (c) 0.2106 (d) 2.106
2. 2.1.8 × 38 — where does the decimal point go? (a) 0.684 (b) 6.84 (c) 684 (d) 68.4
3. 3.0.71 × 3.8 — where does the decimal point go? (a) 0.2698 (b) 0.02698 (c) 2.698 (d) 26.98
4. 4.0.16 × 21 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 33.6 (d) 3.36
5. 5.6.8 × 33 — where does the decimal point go? (a) 2244 (b) 2.244 (c) 224.4 (d) 22.44
6. 6.8.8 × 48 — where does the decimal point go? (a) 422.4 (b) 4.224 (c) 42.24 (d) 4224
7. 7.7.6 × 2.6 — where does the decimal point go? (a) 0.1976 (b) 19.76 (c) 1.976 (d) 197.6
8. 8.0.27 × 31 — where does the decimal point go? (a) 8.37 (b) 0.837 (c) 83.7 (d) 0.0837
9. 9.9.9 × 2 — where does the decimal point go? (a) 19.8 (b) 0.198 (c) 1.98 (d) 198
10. 10.0.62 × 0.8 — where does the decimal point go? (a) 0.496 (b) 4.96 (c) 0.00496 (d) 0.0496
11. 11.0.22 × 21 — where does the decimal point go? (a) 0.462 (b) 0.0462 (c) 4.62 (d) 46.2
12. 12.5.5 × 0.5 — where does the decimal point go? (a) 0.275 (b) 0.0275 (c) 27.5 (d) 2.75
13. 13.2.1 × 14 — where does the decimal point go? (a) 0.294 (b) 29.4 (c) 294 (d) 2.94
14. 14.8.6 × 27 — where does the decimal point go? (a) 23.22 (b) 2322 (c) 2.322 (d) 232.2
15. 15.3.3 × 0.6 — where does the decimal point go? (a) 19.8 (b) 0.0198 (c) 1.98 (d) 0.198
16. 16.7.9 × 0.3 — where does the decimal point go? (a) 0.237 (b) 2.37 (c) 23.7 (d) 0.0237
17. 17.0.46 × 0.6 — where does the decimal point go? (a) 0.00276 (b) 0.276 (c) 0.0276 (d) 2.76
18. 18.4.4 × 1.4 — where does the decimal point go? (a) 0.616 (b) 61.6 (c) 0.0616 (d) 6.16
19. 19.0.14 × 3.4 — where does the decimal point go? (a) 0.00476 (b) 4.76 (c) 0.476 (d) 0.0476
20. 20.3.7 × 17 — where does the decimal point go? (a) 62.9 (b) 6.29 (c) 629 (d) 0.629
21. 21.0.34 × 3 — where does the decimal point go? (a) 1.02 (b) 0.0102 (c) 10.2 (d) 0.102
22. 22.5.2 × 0.7 — where does the decimal point go? (a) 3.64 (b) 36.4 (c) 0.0364 (d) 0.364
23. 23.3.6 × 4 — where does the decimal point go? (a) 144 (b) 1.44 (c) 0.144 (d) 14.4
24. 24.0.38 × 0.2 — where does the decimal point go? (a) 0.76 (b) 0.0076 (c) 0.076 (d) 0.00076
25. 25.7.1 × 0.6 — where does the decimal point go? (a) 0.0426 (b) 4.26 (c) 0.426 (d) 42.6
26. 26.0.16 × 1.9 — where does the decimal point go? (a) 0.304 (b) 0.00304 (c) 0.0304 (d) 3.04
27. 27.0.94 × 2.1 — where does the decimal point go? (a) 1.974 (b) 0.01974 (c) 19.74 (d) 0.1974
28. 28.0.28 × 9 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 0.0252 (d) 25.2
29. 29.6.7 × 32 — where does the decimal point go? (a) 2144 (b) 214.4 (c) 2.144 (d) 21.44
30. 30.2.9 × 1.5 — where does the decimal point go? (a) 0.435 (b) 0.0435 (c) 43.5 (d) 4.35
31. 31.0.83 × 8 — where does the decimal point go? (a) 66.4 (b) 0.0664 (c) 0.664 (d) 6.64
32. 32.0.73 × 0.7 — where does the decimal point go? (a) 0.00511 (b) 0.511 (c) 0.0511 (d) 5.11
33. 33.7.4 × 0.2 — where does the decimal point go? (a) 0.0148 (b) 1.48 (c) 0.148 (d) 14.8
34. 34.9.4 × 4 — where does the decimal point go? (a) 376 (b) 3.76 (c) 0.376 (d) 37.6
35. 35.2.2 × 0.8 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.0176 (d) 0.176
36. 36.6.1 × 3 — where does the decimal point go? (a) 0.183 (b) 1.83 (c) 183 (d) 18.3
37. 37.7.1 × 24 — where does the decimal point go? (a) 17.04 (b) 1.704 (c) 170.4 (d) 1704
38. 38.0.97 × 0.4 — where does the decimal point go? (a) 0.388 (b) 0.00388 (c) 0.0388 (d) 3.88
39. 39.0.21 × 0.9 — where does the decimal point go? (a) 0.189 (b) 1.89 (c) 0.0189 (d) 0.00189
40. 40.8.1 × 6 — where does the decimal point go? (a) 0.486 (b) 486 (c) 4.86 (d) 48.6

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