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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 831 · 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. 1.0.13 × 13 — where does the decimal point go? (a) 0.169 (b) 1.69 (c) 16.9 (d) 0.0169
  2. 2.1.6 × 0.7 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 0.0112 (d) 11.2
  3. 3.0.96 × 0.2 — where does the decimal point go? (a) 0.192 (b) 0.0192 (c) 0.00192 (d) 1.92
  4. 4.1.5 × 3 — where does the decimal point go? (a) 0.045 (b) 45 (c) 4.5 (d) 0.45
  5. 5.0.57 × 0.6 — where does the decimal point go? (a) 0.0342 (b) 0.00342 (c) 0.342 (d) 3.42
  6. 6.0.19 × 1.9 — where does the decimal point go? (a) 0.00361 (b) 0.361 (c) 0.0361 (d) 3.61
  7. 7.3.3 × 8 — where does the decimal point go? (a) 264 (b) 2.64 (c) 26.4 (d) 0.264
  8. 8.8.8 × 0.8 — where does the decimal point go? (a) 7.04 (b) 70.4 (c) 0.704 (d) 0.0704
  9. 9.3.1 × 0.2 — where does the decimal point go? (a) 0.62 (b) 6.2 (c) 0.062 (d) 0.0062
  10. 10.3.3 × 22 — where does the decimal point go? (a) 72.6 (b) 7.26 (c) 0.726 (d) 726
  11. 11.2.5 × 9 — where does the decimal point go? (a) 22.5 (b) 2.25 (c) 0.225 (d) 225
  12. 12.6.8 × 9 — where does the decimal point go? (a) 6.12 (b) 612 (c) 0.612 (d) 61.2
  13. 13.4.1 × 4.7 — where does the decimal point go? (a) 19.27 (b) 1.927 (c) 0.1927 (d) 192.7
  14. 14.3.3 × 19 — where does the decimal point go? (a) 62.7 (b) 6.27 (c) 627 (d) 0.627
  15. 15.7.1 × 0.9 — where does the decimal point go? (a) 6.39 (b) 0.0639 (c) 63.9 (d) 0.639
  16. 16.0.44 × 1.7 — where does the decimal point go? (a) 0.00748 (b) 0.748 (c) 0.0748 (d) 7.48
  17. 17.0.92 × 23 — where does the decimal point go? (a) 0.2116 (b) 211.6 (c) 2.116 (d) 21.16
  18. 18.0.17 × 2.9 — where does the decimal point go? (a) 0.00493 (b) 4.93 (c) 0.493 (d) 0.0493
  19. 19.6.4 × 3 — where does the decimal point go? (a) 192 (b) 19.2 (c) 1.92 (d) 0.192
  20. 20.0.36 × 2 — where does the decimal point go? (a) 0.0072 (b) 0.72 (c) 0.072 (d) 7.2
  21. 21.4.6 × 9 — where does the decimal point go? (a) 41.4 (b) 414 (c) 0.414 (d) 4.14
  22. 22.2.3 × 0.9 — where does the decimal point go? (a) 0.207 (b) 20.7 (c) 2.07 (d) 0.0207
  23. 23.0.91 × 49 — where does the decimal point go? (a) 4.459 (b) 445.9 (c) 0.4459 (d) 44.59
  24. 24.3.2 × 6 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 1.92 (d) 192
  25. 25.5.7 × 8 — where does the decimal point go? (a) 0.456 (b) 4.56 (c) 456 (d) 45.6
  26. 26.0.97 × 8 — where does the decimal point go? (a) 77.6 (b) 0.0776 (c) 7.76 (d) 0.776
  27. 27.0.29 × 0.5 — where does the decimal point go? (a) 0.00145 (b) 0.145 (c) 1.45 (d) 0.0145
  28. 28.0.88 × 3.6 — where does the decimal point go? (a) 31.68 (b) 0.3168 (c) 0.03168 (d) 3.168
  29. 29.0.29 × 38 — where does the decimal point go? (a) 11.02 (b) 1.102 (c) 110.2 (d) 0.1102
  30. 30.0.74 × 44 — where does the decimal point go? (a) 0.3256 (b) 325.6 (c) 32.56 (d) 3.256
  31. 31.0.74 × 0.9 — where does the decimal point go? (a) 0.666 (b) 0.0666 (c) 0.00666 (d) 6.66
  32. 32.7.6 × 2 — where does the decimal point go? (a) 0.152 (b) 152 (c) 15.2 (d) 1.52
  33. 33.4.4 × 37 — where does the decimal point go? (a) 162.8 (b) 1.628 (c) 1628 (d) 16.28
  34. 34.0.39 × 13 — where does the decimal point go? (a) 50.7 (b) 5.07 (c) 0.0507 (d) 0.507
  35. 35.1.3 × 1.2 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 0.156 (d) 15.6
  36. 36.1.6 × 0.4 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 0.0064 (d) 6.4
  37. 37.1.4 × 24 — where does the decimal point go? (a) 0.336 (b) 336 (c) 3.36 (d) 33.6
  38. 38.5.6 × 1.8 — where does the decimal point go? (a) 10.08 (b) 1.008 (c) 100.8 (d) 0.1008
  39. 39.0.23 × 0.6 — where does the decimal point go? (a) 0.0138 (b) 0.00138 (c) 0.138 (d) 1.38
  40. 40.2.8 × 0.3 — where does the decimal point go? (a) 0.0084 (b) 0.84 (c) 8.4 (d) 0.084

Answer key

  1. 1.69
  2. 1.12
  3. 0.192
  4. 4.5
  5. 0.342
  6. 0.361
  7. 26.4
  8. 7.04
  9. 0.62
  10. 72.6
  11. 22.5
  12. 61.2
  13. 19.27
  14. 62.7
  15. 6.39
  16. 0.748
  17. 21.16
  18. 0.493
  19. 19.2
  20. 0.72
  21. 41.4
  22. 2.07
  23. 44.59
  24. 19.2
  25. 45.6
  26. 7.76
  27. 0.145
  28. 3.168
  29. 11.02
  30. 32.56
  31. 0.666
  32. 15.2
  33. 162.8
  34. 5.07
  35. 1.56
  36. 0.64
  37. 33.6
  38. 10.08
  39. 0.138
  40. 0.84

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