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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 165 · 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. 1.2.7 × 2 — where does the decimal point go? (a) 54 (b) 0.054 (c) 0.54 (d) 5.4
  2. 2.6.4 × 49 — where does the decimal point go? (a) 313.6 (b) 3.136 (c) 3136 (d) 31.36
  3. 3.8.2 × 4 — where does the decimal point go? (a) 32.8 (b) 0.328 (c) 328 (d) 3.28
  4. 4.0.12 × 0.2 — where does the decimal point go? (a) 0.24 (b) 0.0024 (c) 0.024 (d) 0.00024
  5. 5.4.5 × 0.5 — where does the decimal point go? (a) 22.5 (b) 0.0225 (c) 2.25 (d) 0.225
  6. 6.0.26 × 0.7 — where does the decimal point go? (a) 1.82 (b) 0.00182 (c) 0.182 (d) 0.0182
  7. 7.1.3 × 6 — where does the decimal point go? (a) 0.078 (b) 7.8 (c) 0.78 (d) 78
  8. 8.4.9 × 0.7 — where does the decimal point go? (a) 0.343 (b) 0.0343 (c) 34.3 (d) 3.43
  9. 9.0.76 × 0.3 — where does the decimal point go? (a) 0.228 (b) 0.0228 (c) 0.00228 (d) 2.28
  10. 10.0.78 × 2 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 0.0156 (d) 0.156
  11. 11.2.2 × 0.3 — where does the decimal point go? (a) 0.066 (b) 0.66 (c) 6.6 (d) 0.0066
  12. 12.9.1 × 7 — where does the decimal point go? (a) 63.7 (b) 6.37 (c) 637 (d) 0.637
  13. 13.3.3 × 0.5 — where does the decimal point go? (a) 0.165 (b) 1.65 (c) 16.5 (d) 0.0165
  14. 14.0.79 × 0.8 — where does the decimal point go? (a) 6.32 (b) 0.632 (c) 0.00632 (d) 0.0632
  15. 15.5.8 × 4 — where does the decimal point go? (a) 2.32 (b) 23.2 (c) 0.232 (d) 232
  16. 16.0.39 × 4 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 0.0156 (d) 0.156
  17. 17.1.8 × 3.6 — where does the decimal point go? (a) 0.648 (b) 6.48 (c) 0.0648 (d) 64.8
  18. 18.0.49 × 7 — where does the decimal point go? (a) 34.3 (b) 3.43 (c) 0.0343 (d) 0.343
  19. 19.0.77 × 0.2 — where does the decimal point go? (a) 0.00154 (b) 1.54 (c) 0.154 (d) 0.0154
  20. 20.0.39 × 0.4 — where does the decimal point go? (a) 0.0156 (b) 0.156 (c) 1.56 (d) 0.00156
  21. 21.8.7 × 36 — where does the decimal point go? (a) 3132 (b) 313.2 (c) 31.32 (d) 3.132
  22. 22.0.72 × 4 — where does the decimal point go? (a) 0.0288 (b) 28.8 (c) 2.88 (d) 0.288
  23. 23.2.3 × 34 — where does the decimal point go? (a) 0.782 (b) 78.2 (c) 782 (d) 7.82
  24. 24.5.9 × 4 — where does the decimal point go? (a) 0.236 (b) 23.6 (c) 236 (d) 2.36
  25. 25.0.33 × 1.2 — where does the decimal point go? (a) 0.00396 (b) 0.396 (c) 0.0396 (d) 3.96
  26. 26.5.3 × 21 — where does the decimal point go? (a) 1113 (b) 11.13 (c) 1.113 (d) 111.3
  27. 27.9.1 × 4 — where does the decimal point go? (a) 36.4 (b) 3.64 (c) 0.364 (d) 364
  28. 28.0.71 × 21 — where does the decimal point go? (a) 149.1 (b) 1.491 (c) 14.91 (d) 0.1491
  29. 29.0.56 × 0.7 — where does the decimal point go? (a) 0.0392 (b) 3.92 (c) 0.00392 (d) 0.392
  30. 30.5.7 × 27 — where does the decimal point go? (a) 1539 (b) 1.539 (c) 153.9 (d) 15.39
  31. 31.7.2 × 2 — where does the decimal point go? (a) 1.44 (b) 0.144 (c) 14.4 (d) 144
  32. 32.3.7 × 0.6 — where does the decimal point go? (a) 2.22 (b) 22.2 (c) 0.222 (d) 0.0222
  33. 33.0.87 × 39 — where does the decimal point go? (a) 0.3393 (b) 33.93 (c) 3.393 (d) 339.3
  34. 34.3.1 × 4.7 — where does the decimal point go? (a) 0.1457 (b) 14.57 (c) 145.7 (d) 1.457
  35. 35.0.22 × 3 — where does the decimal point go? (a) 6.6 (b) 0.66 (c) 0.0066 (d) 0.066
  36. 36.1.2 × 1.3 — where does the decimal point go? (a) 1.56 (b) 15.6 (c) 0.0156 (d) 0.156
  37. 37.2.8 × 4 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.112 (d) 112
  38. 38.5.2 × 3 — where does the decimal point go? (a) 1.56 (b) 156 (c) 15.6 (d) 0.156
  39. 39.3.9 × 5 — where does the decimal point go? (a) 19.5 (b) 0.195 (c) 1.95 (d) 195
  40. 40.7.9 × 12 — where does the decimal point go? (a) 0.948 (b) 9.48 (c) 94.8 (d) 948

Answer key

  1. 5.4
  2. 313.6
  3. 32.8
  4. 0.024
  5. 2.25
  6. 0.182
  7. 7.8
  8. 3.43
  9. 0.228
  10. 1.56
  11. 0.66
  12. 63.7
  13. 1.65
  14. 0.632
  15. 23.2
  16. 1.56
  17. 6.48
  18. 3.43
  19. 0.154
  20. 0.156
  21. 313.2
  22. 2.88
  23. 78.2
  24. 23.6
  25. 0.396
  26. 111.3
  27. 36.4
  28. 14.91
  29. 0.392
  30. 153.9
  31. 14.4
  32. 2.22
  33. 33.93
  34. 14.57
  35. 0.66
  36. 1.56
  37. 11.2
  38. 15.6
  39. 19.5
  40. 94.8

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