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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 61 · 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. 1.0.16 × 0.7 — where does the decimal point go? (a) 0.00112 (b) 1.12 (c) 0.0112 (d) 0.112
  2. 2.7.2 × 31 — where does the decimal point go? (a) 22.32 (b) 223.2 (c) 2232 (d) 2.232
  3. 3.2.8 × 4 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.112 (d) 112
  4. 4.9.6 × 33 — where does the decimal point go? (a) 3.168 (b) 31.68 (c) 3168 (d) 316.8
  5. 5.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 28 (c) 0.28 (d) 0.028
  6. 6.9.7 × 0.5 — where does the decimal point go? (a) 0.0485 (b) 4.85 (c) 48.5 (d) 0.485
  7. 7.0.24 × 3 — where does the decimal point go? (a) 0.072 (b) 0.72 (c) 0.0072 (d) 7.2
  8. 8.2.9 × 6 — where does the decimal point go? (a) 17.4 (b) 1.74 (c) 0.174 (d) 174
  9. 9.4.7 × 39 — where does the decimal point go? (a) 1.833 (b) 1833 (c) 183.3 (d) 18.33
  10. 10.6.6 × 4 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 264 (d) 2.64
  11. 11.5.8 × 0.7 — where does the decimal point go? (a) 40.6 (b) 4.06 (c) 0.406 (d) 0.0406
  12. 12.5.1 × 3.4 — where does the decimal point go? (a) 0.1734 (b) 1.734 (c) 17.34 (d) 173.4
  13. 13.1.6 × 0.2 — where does the decimal point go? (a) 0.0032 (b) 0.032 (c) 3.2 (d) 0.32
  14. 14.0.19 × 0.5 — where does the decimal point go? (a) 0.95 (b) 0.095 (c) 0.0095 (d) 0.00095
  15. 15.0.86 × 19 — where does the decimal point go? (a) 163.4 (b) 1.634 (c) 16.34 (d) 0.1634
  16. 16.0.46 × 0.4 — where does the decimal point go? (a) 0.0184 (b) 0.184 (c) 1.84 (d) 0.00184
  17. 17.0.62 × 3.3 — where does the decimal point go? (a) 0.2046 (b) 20.46 (c) 0.02046 (d) 2.046
  18. 18.0.65 × 0.5 — where does the decimal point go? (a) 3.25 (b) 0.325 (c) 0.0325 (d) 0.00325
  19. 19.1.2 × 48 — where does the decimal point go? (a) 5.76 (b) 576 (c) 0.576 (d) 57.6
  20. 20.7.1 × 4.7 — where does the decimal point go? (a) 3.337 (b) 0.3337 (c) 333.7 (d) 33.37
  21. 21.0.37 × 9 — where does the decimal point go? (a) 3.33 (b) 33.3 (c) 0.0333 (d) 0.333
  22. 22.0.61 × 0.8 — where does the decimal point go? (a) 0.0488 (b) 4.88 (c) 0.488 (d) 0.00488
  23. 23.6.8 × 12 — where does the decimal point go? (a) 81.6 (b) 8.16 (c) 0.816 (d) 816
  24. 24.8.9 × 0.8 — where does the decimal point go? (a) 0.0712 (b) 7.12 (c) 71.2 (d) 0.712
  25. 25.0.62 × 4.9 — where does the decimal point go? (a) 0.03038 (b) 3.038 (c) 0.3038 (d) 30.38
  26. 26.0.49 × 0.3 — where does the decimal point go? (a) 0.00147 (b) 0.147 (c) 1.47 (d) 0.0147
  27. 27.0.33 × 5 — where does the decimal point go? (a) 0.0165 (b) 1.65 (c) 16.5 (d) 0.165
  28. 28.6.2 × 0.4 — where does the decimal point go? (a) 0.248 (b) 2.48 (c) 0.0248 (d) 24.8
  29. 29.7.5 × 9 — where does the decimal point go? (a) 675 (b) 6.75 (c) 67.5 (d) 0.675
  30. 30.0.93 × 0.5 — where does the decimal point go? (a) 0.465 (b) 0.00465 (c) 0.0465 (d) 4.65
  31. 31.8.5 × 3.9 — where does the decimal point go? (a) 33.15 (b) 0.3315 (c) 331.5 (d) 3.315
  32. 32.3.6 × 8 — where does the decimal point go? (a) 288 (b) 28.8 (c) 0.288 (d) 2.88
  33. 33.0.85 × 47 — where does the decimal point go? (a) 39.95 (b) 0.3995 (c) 399.5 (d) 3.995
  34. 34.0.17 × 0.4 — where does the decimal point go? (a) 0.068 (b) 0.0068 (c) 0.00068 (d) 0.68
  35. 35.0.19 × 4 — where does the decimal point go? (a) 0.076 (b) 0.76 (c) 7.6 (d) 0.0076
  36. 36.2.4 × 0.8 — where does the decimal point go? (a) 0.0192 (b) 19.2 (c) 1.92 (d) 0.192
  37. 37.2.9 × 35 — where does the decimal point go? (a) 10.15 (b) 1015 (c) 101.5 (d) 1.015
  38. 38.9.2 × 7 — where does the decimal point go? (a) 0.644 (b) 644 (c) 64.4 (d) 6.44
  39. 39.4.9 × 0.7 — where does the decimal point go? (a) 34.3 (b) 0.343 (c) 3.43 (d) 0.0343
  40. 40.0.44 × 9 — where does the decimal point go? (a) 0.396 (b) 39.6 (c) 3.96 (d) 0.0396

Answer key

  1. 0.112
  2. 223.2
  3. 11.2
  4. 316.8
  5. 2.8
  6. 4.85
  7. 0.72
  8. 17.4
  9. 183.3
  10. 26.4
  11. 4.06
  12. 17.34
  13. 0.32
  14. 0.095
  15. 16.34
  16. 0.184
  17. 2.046
  18. 0.325
  19. 57.6
  20. 33.37
  21. 3.33
  22. 0.488
  23. 81.6
  24. 7.12
  25. 3.038
  26. 0.147
  27. 1.65
  28. 2.48
  29. 67.5
  30. 0.465
  31. 33.15
  32. 28.8
  33. 39.95
  34. 0.068
  35. 0.76
  36. 1.92
  37. 101.5
  38. 64.4
  39. 3.43
  40. 3.96

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