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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 288 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.5.6 × 0.2 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 0.0112 (d) 11.2
  2. 2.3.1 × 36 — where does the decimal point go? (a) 11.16 (b) 1116 (c) 111.6 (d) 1.116
  3. 3.4.7 × 9 — where does the decimal point go? (a) 0.423 (b) 42.3 (c) 4.23 (d) 423
  4. 4.0.23 × 11 — where does the decimal point go? (a) 0.0253 (b) 25.3 (c) 2.53 (d) 0.253
  5. 5.6.4 × 9 — where does the decimal point go? (a) 5.76 (b) 0.576 (c) 576 (d) 57.6
  6. 6.0.55 × 0.7 — where does the decimal point go? (a) 0.385 (b) 0.00385 (c) 0.0385 (d) 3.85
  7. 7.2.1 × 1.2 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 0.0252
  8. 8.0.14 × 3 — where does the decimal point go? (a) 4.2 (b) 0.0042 (c) 0.042 (d) 0.42
  9. 9.0.69 × 0.4 — where does the decimal point go? (a) 0.00276 (b) 0.0276 (c) 2.76 (d) 0.276
  10. 10.4.9 × 0.4 — where does the decimal point go? (a) 0.0196 (b) 19.6 (c) 1.96 (d) 0.196
  11. 11.0.82 × 2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 0.0164 (d) 16.4
  12. 12.0.81 × 0.4 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 0.00324 (d) 0.324
  13. 13.0.46 × 29 — where does the decimal point go? (a) 1.334 (b) 133.4 (c) 13.34 (d) 0.1334
  14. 14.0.29 × 0.9 — where does the decimal point go? (a) 0.261 (b) 0.00261 (c) 2.61 (d) 0.0261
  15. 15.0.75 × 5 — where does the decimal point go? (a) 0.375 (b) 37.5 (c) 3.75 (d) 0.0375
  16. 16.2.4 × 3 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 72 (d) 0.072
  17. 17.0.18 × 8 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 14.4 (d) 0.0144
  18. 18.4.9 × 0.8 — where does the decimal point go? (a) 0.392 (b) 39.2 (c) 0.0392 (d) 3.92
  19. 19.0.21 × 0.8 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 0.0168 (d) 0.00168
  20. 20.3.2 × 16 — where does the decimal point go? (a) 0.512 (b) 51.2 (c) 512 (d) 5.12
  21. 21.0.34 × 1.2 — where does the decimal point go? (a) 0.408 (b) 0.0408 (c) 0.00408 (d) 4.08
  22. 22.5.8 × 9 — where does the decimal point go? (a) 5.22 (b) 522 (c) 0.522 (d) 52.2
  23. 23.7.8 × 0.8 — where does the decimal point go? (a) 6.24 (b) 62.4 (c) 0.0624 (d) 0.624
  24. 24.0.13 × 6 — where does the decimal point go? (a) 0.078 (b) 0.0078 (c) 0.78 (d) 7.8
  25. 25.2.6 × 3 — where does the decimal point go? (a) 0.078 (b) 78 (c) 0.78 (d) 7.8
  26. 26.8.9 × 19 — where does the decimal point go? (a) 1691 (b) 16.91 (c) 1.691 (d) 169.1
  27. 27.8.5 × 4.7 — where does the decimal point go? (a) 39.95 (b) 399.5 (c) 0.3995 (d) 3.995
  28. 28.9.9 × 28 — where does the decimal point go? (a) 2772 (b) 277.2 (c) 2.772 (d) 27.72
  29. 29.5.5 × 41 — where does the decimal point go? (a) 2255 (b) 225.5 (c) 22.55 (d) 2.255
  30. 30.0.59 × 2 — where does the decimal point go? (a) 0.0118 (b) 0.118 (c) 11.8 (d) 1.18
  31. 31.0.97 × 48 — where does the decimal point go? (a) 46.56 (b) 0.4656 (c) 465.6 (d) 4.656
  32. 32.0.42 × 0.6 — where does the decimal point go? (a) 0.00252 (b) 0.252 (c) 2.52 (d) 0.0252
  33. 33.5.7 × 9 — where does the decimal point go? (a) 0.513 (b) 51.3 (c) 5.13 (d) 513
  34. 34.0.43 × 17 — where does the decimal point go? (a) 0.731 (b) 7.31 (c) 0.0731 (d) 73.1
  35. 35.5.8 × 3.3 — where does the decimal point go? (a) 1.914 (b) 19.14 (c) 0.1914 (d) 191.4
  36. 36.0.67 × 2.6 — where does the decimal point go? (a) 1.742 (b) 0.1742 (c) 0.01742 (d) 17.42
  37. 37.0.87 × 1.8 — where does the decimal point go? (a) 0.01566 (b) 1.566 (c) 15.66 (d) 0.1566
  38. 38.2.2 × 2.6 — where does the decimal point go? (a) 5.72 (b) 0.572 (c) 0.0572 (d) 57.2
  39. 39.8.3 × 6 — where does the decimal point go? (a) 49.8 (b) 4.98 (c) 0.498 (d) 498
  40. 40.4.6 × 3.3 — where does the decimal point go? (a) 15.18 (b) 0.1518 (c) 151.8 (d) 1.518

Answer key

  1. 1.12
  2. 111.6
  3. 42.3
  4. 2.53
  5. 57.6
  6. 0.385
  7. 2.52
  8. 0.42
  9. 0.276
  10. 1.96
  11. 1.64
  12. 0.324
  13. 13.34
  14. 0.261
  15. 3.75
  16. 7.2
  17. 1.44
  18. 3.92
  19. 0.168
  20. 51.2
  21. 0.408
  22. 52.2
  23. 6.24
  24. 0.78
  25. 7.8
  26. 169.1
  27. 39.95
  28. 277.2
  29. 225.5
  30. 1.18
  31. 46.56
  32. 0.252
  33. 51.3
  34. 7.31
  35. 19.14
  36. 1.742
  37. 1.566
  38. 5.72
  39. 49.8
  40. 15.18

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