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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 216 · 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. 1.1.4 × 2 — where does the decimal point go? (a) 0.28 (b) 0.028 (c) 2.8 (d) 28
  2. 2.3.1 × 17 — where does the decimal point go? (a) 0.527 (b) 5.27 (c) 527 (d) 52.7
  3. 3.0.61 × 5 — where does the decimal point go? (a) 0.305 (b) 3.05 (c) 0.0305 (d) 30.5
  4. 4.0.53 × 45 — where does the decimal point go? (a) 0.2385 (b) 2.385 (c) 23.85 (d) 238.5
  5. 5.0.84 × 6 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 50.4 (d) 5.04
  6. 6.0.91 × 5 — where does the decimal point go? (a) 0.0455 (b) 45.5 (c) 4.55 (d) 0.455
  7. 7.0.23 × 21 — where does the decimal point go? (a) 48.3 (b) 4.83 (c) 0.0483 (d) 0.483
  8. 8.0.68 × 0.7 — where does the decimal point go? (a) 0.476 (b) 4.76 (c) 0.00476 (d) 0.0476
  9. 9.0.54 × 8 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 4.32 (d) 0.0432
  10. 10.7.8 × 0.2 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 0.156 (d) 15.6
  11. 11.4.3 × 7 — where does the decimal point go? (a) 0.301 (b) 301 (c) 30.1 (d) 3.01
  12. 12.7.1 × 4.4 — where does the decimal point go? (a) 31.24 (b) 312.4 (c) 0.3124 (d) 3.124
  13. 13.6.5 × 2.3 — where does the decimal point go? (a) 0.1495 (b) 149.5 (c) 1.495 (d) 14.95
  14. 14.3.7 × 0.2 — where does the decimal point go? (a) 0.0074 (b) 7.4 (c) 0.074 (d) 0.74
  15. 15.0.19 × 33 — where does the decimal point go? (a) 62.7 (b) 0.0627 (c) 6.27 (d) 0.627
  16. 16.2.6 × 0.9 — where does the decimal point go? (a) 2.34 (b) 0.0234 (c) 0.234 (d) 23.4
  17. 17.0.93 × 1.5 — where does the decimal point go? (a) 0.1395 (b) 0.01395 (c) 13.95 (d) 1.395
  18. 18.0.57 × 5 — where does the decimal point go? (a) 0.0285 (b) 2.85 (c) 28.5 (d) 0.285
  19. 19.0.17 × 19 — where does the decimal point go? (a) 0.0323 (b) 0.323 (c) 32.3 (d) 3.23
  20. 20.4.1 × 9 — where does the decimal point go? (a) 3.69 (b) 369 (c) 36.9 (d) 0.369
  21. 21.1.8 × 7 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.126 (d) 126
  22. 22.0.47 × 0.2 — where does the decimal point go? (a) 0.0094 (b) 0.00094 (c) 0.94 (d) 0.094
  23. 23.3.1 × 6 — where does the decimal point go? (a) 186 (b) 1.86 (c) 0.186 (d) 18.6
  24. 24.2.1 × 0.5 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 10.5 (d) 0.105
  25. 25.9.1 × 3.5 — where does the decimal point go? (a) 31.85 (b) 318.5 (c) 0.3185 (d) 3.185
  26. 26.6.7 × 11 — where does the decimal point go? (a) 7.37 (b) 73.7 (c) 0.737 (d) 737
  27. 27.7.6 × 0.4 — where does the decimal point go? (a) 0.0304 (b) 30.4 (c) 3.04 (d) 0.304
  28. 28.2.6 × 0.7 — where does the decimal point go? (a) 0.0182 (b) 0.182 (c) 1.82 (d) 18.2
  29. 29.1.5 × 9 — where does the decimal point go? (a) 13.5 (b) 1.35 (c) 0.135 (d) 135
  30. 30.0.42 × 31 — where does the decimal point go? (a) 0.1302 (b) 13.02 (c) 1.302 (d) 130.2
  31. 31.2.4 × 17 — where does the decimal point go? (a) 4.08 (b) 408 (c) 40.8 (d) 0.408
  32. 32.2.2 × 0.3 — where does the decimal point go? (a) 0.066 (b) 0.66 (c) 0.0066 (d) 6.6
  33. 33.8.4 × 1.2 — where does the decimal point go? (a) 100.8 (b) 0.1008 (c) 1.008 (d) 10.08
  34. 34.1.2 × 14 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 168 (d) 0.168
  35. 35.3.2 × 4 — where does the decimal point go? (a) 1.28 (b) 12.8 (c) 0.128 (d) 128
  36. 36.0.68 × 48 — where does the decimal point go? (a) 326.4 (b) 0.3264 (c) 3.264 (d) 32.64
  37. 37.2.2 × 2.4 — where does the decimal point go? (a) 0.528 (b) 5.28 (c) 0.0528 (d) 52.8
  38. 38.0.27 × 1.5 — where does the decimal point go? (a) 0.405 (b) 4.05 (c) 0.0405 (d) 0.00405
  39. 39.0.97 × 4.6 — where does the decimal point go? (a) 4.462 (b) 44.62 (c) 0.04462 (d) 0.4462
  40. 40.7.7 × 4 — where does the decimal point go? (a) 30.8 (b) 3.08 (c) 0.308 (d) 308

Answer key

  1. 2.8
  2. 52.7
  3. 3.05
  4. 23.85
  5. 5.04
  6. 4.55
  7. 4.83
  8. 0.476
  9. 4.32
  10. 1.56
  11. 30.1
  12. 31.24
  13. 14.95
  14. 0.74
  15. 6.27
  16. 2.34
  17. 1.395
  18. 2.85
  19. 3.23
  20. 36.9
  21. 12.6
  22. 0.094
  23. 18.6
  24. 1.05
  25. 31.85
  26. 73.7
  27. 3.04
  28. 1.82
  29. 13.5
  30. 13.02
  31. 40.8
  32. 0.66
  33. 10.08
  34. 16.8
  35. 12.8
  36. 32.64
  37. 5.28
  38. 0.405
  39. 4.462
  40. 30.8

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