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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 591 · 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. 1.6.2 × 26 — where does the decimal point go? (a) 1.612 (b) 16.12 (c) 161.2 (d) 1612
  2. 2.0.73 × 43 — where does the decimal point go? (a) 31.39 (b) 313.9 (c) 3.139 (d) 0.3139
  3. 3.0.19 × 12 — where does the decimal point go? (a) 0.228 (b) 2.28 (c) 22.8 (d) 0.0228
  4. 4.0.84 × 6 — where does the decimal point go? (a) 0.0504 (b) 50.4 (c) 0.504 (d) 5.04
  5. 5.1.8 × 8 — where does the decimal point go? (a) 144 (b) 1.44 (c) 14.4 (d) 0.144
  6. 6.0.64 × 0.3 — where does the decimal point go? (a) 0.0192 (b) 0.00192 (c) 1.92 (d) 0.192
  7. 7.0.67 × 2.3 — where does the decimal point go? (a) 15.41 (b) 0.01541 (c) 0.1541 (d) 1.541
  8. 8.3.3 × 0.6 — where does the decimal point go? (a) 1.98 (b) 0.0198 (c) 0.198 (d) 19.8
  9. 9.7.1 × 3.1 — where does the decimal point go? (a) 0.2201 (b) 22.01 (c) 2.201 (d) 220.1
  10. 10.0.53 × 6 — where does the decimal point go? (a) 31.8 (b) 3.18 (c) 0.0318 (d) 0.318
  11. 11.0.85 × 15 — where does the decimal point go? (a) 0.1275 (b) 12.75 (c) 127.5 (d) 1.275
  12. 12.0.72 × 16 — where does the decimal point go? (a) 115.2 (b) 1.152 (c) 0.1152 (d) 11.52
  13. 13.0.14 × 17 — where does the decimal point go? (a) 0.0238 (b) 0.238 (c) 2.38 (d) 23.8
  14. 14.0.96 × 32 — where does the decimal point go? (a) 0.3072 (b) 30.72 (c) 3.072 (d) 307.2
  15. 15.0.99 × 24 — where does the decimal point go? (a) 0.2376 (b) 2.376 (c) 237.6 (d) 23.76
  16. 16.2.2 × 4 — where does the decimal point go? (a) 0.088 (b) 88 (c) 0.88 (d) 8.8
  17. 17.1.3 × 4 — where does the decimal point go? (a) 0.52 (b) 5.2 (c) 0.052 (d) 52
  18. 18.8.9 × 33 — where does the decimal point go? (a) 2.937 (b) 29.37 (c) 293.7 (d) 2937
  19. 19.6.7 × 2 — where does the decimal point go? (a) 1.34 (b) 13.4 (c) 0.134 (d) 134
  20. 20.6.9 × 0.5 — where does the decimal point go? (a) 0.0345 (b) 3.45 (c) 0.345 (d) 34.5
  21. 21.8.2 × 9 — where does the decimal point go? (a) 73.8 (b) 738 (c) 0.738 (d) 7.38
  22. 22.7.8 × 2 — where does the decimal point go? (a) 0.156 (b) 156 (c) 15.6 (d) 1.56
  23. 23.7.2 × 46 — where does the decimal point go? (a) 3.312 (b) 33.12 (c) 331.2 (d) 3312
  24. 24.5.1 × 6 — where does the decimal point go? (a) 30.6 (b) 3.06 (c) 0.306 (d) 306
  25. 25.0.29 × 2 — where does the decimal point go? (a) 0.0058 (b) 0.058 (c) 5.8 (d) 0.58
  26. 26.0.53 × 0.4 — where does the decimal point go? (a) 2.12 (b) 0.212 (c) 0.00212 (d) 0.0212
  27. 27.7.4 × 38 — where does the decimal point go? (a) 2.812 (b) 2812 (c) 28.12 (d) 281.2
  28. 28.4.8 × 7 — where does the decimal point go? (a) 0.336 (b) 336 (c) 33.6 (d) 3.36
  29. 29.7.7 × 32 — where does the decimal point go? (a) 246.4 (b) 24.64 (c) 2.464 (d) 2464
  30. 30.4.5 × 9 — where does the decimal point go? (a) 40.5 (b) 4.05 (c) 0.405 (d) 405
  31. 31.3.3 × 6 — where does the decimal point go? (a) 0.198 (b) 19.8 (c) 1.98 (d) 198
  32. 32.0.68 × 28 — where does the decimal point go? (a) 1.904 (b) 19.04 (c) 190.4 (d) 0.1904
  33. 33.0.15 × 0.5 — where does the decimal point go? (a) 0.00075 (b) 0.0075 (c) 0.75 (d) 0.075
  34. 34.9.4 × 2 — where does the decimal point go? (a) 0.188 (b) 1.88 (c) 18.8 (d) 188
  35. 35.0.31 × 3 — where does the decimal point go? (a) 0.093 (b) 0.0093 (c) 0.93 (d) 9.3
  36. 36.7.8 × 0.7 — where does the decimal point go? (a) 5.46 (b) 0.0546 (c) 0.546 (d) 54.6
  37. 37.0.78 × 8 — where does the decimal point go? (a) 62.4 (b) 0.624 (c) 6.24 (d) 0.0624
  38. 38.0.71 × 5 — where does the decimal point go? (a) 0.355 (b) 0.0355 (c) 3.55 (d) 35.5
  39. 39.0.44 × 2 — where does the decimal point go? (a) 0.88 (b) 0.0088 (c) 0.088 (d) 8.8
  40. 40.0.83 × 0.5 — where does the decimal point go? (a) 0.415 (b) 0.00415 (c) 4.15 (d) 0.0415

Answer key

  1. 161.2
  2. 31.39
  3. 2.28
  4. 5.04
  5. 14.4
  6. 0.192
  7. 1.541
  8. 1.98
  9. 22.01
  10. 3.18
  11. 12.75
  12. 11.52
  13. 2.38
  14. 30.72
  15. 23.76
  16. 8.8
  17. 5.2
  18. 293.7
  19. 13.4
  20. 3.45
  21. 73.8
  22. 15.6
  23. 331.2
  24. 30.6
  25. 0.58
  26. 0.212
  27. 281.2
  28. 33.6
  29. 246.4
  30. 40.5
  31. 19.8
  32. 19.04
  33. 0.075
  34. 18.8
  35. 0.93
  36. 5.46
  37. 6.24
  38. 3.55
  39. 0.88
  40. 0.415

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