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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 984 · 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. 1.2.9 × 2.4 — where does the decimal point go? (a) 0.696 (b) 6.96 (c) 0.0696 (d) 69.6
  2. 2.0.88 × 0.3 — where does the decimal point go? (a) 0.0264 (b) 0.00264 (c) 0.264 (d) 2.64
  3. 3.0.93 × 3.9 — where does the decimal point go? (a) 3.627 (b) 0.3627 (c) 36.27 (d) 0.03627
  4. 4.9.3 × 3.2 — where does the decimal point go? (a) 29.76 (b) 297.6 (c) 0.2976 (d) 2.976
  5. 5.3.1 × 7 — where does the decimal point go? (a) 2.17 (b) 217 (c) 21.7 (d) 0.217
  6. 6.0.46 × 4.4 — where does the decimal point go? (a) 20.24 (b) 0.2024 (c) 0.02024 (d) 2.024
  7. 7.4.1 × 6 — where does the decimal point go? (a) 0.246 (b) 24.6 (c) 2.46 (d) 246
  8. 8.4.9 × 0.6 — where does the decimal point go? (a) 0.294 (b) 0.0294 (c) 2.94 (d) 29.4
  9. 9.7.9 × 2.9 — where does the decimal point go? (a) 229.1 (b) 2.291 (c) 22.91 (d) 0.2291
  10. 10.7.8 × 34 — where does the decimal point go? (a) 2652 (b) 2.652 (c) 26.52 (d) 265.2
  11. 11.7.9 × 21 — where does the decimal point go? (a) 1659 (b) 16.59 (c) 165.9 (d) 1.659
  12. 12.1.7 × 0.2 — where does the decimal point go? (a) 3.4 (b) 0.0034 (c) 0.034 (d) 0.34
  13. 13.8.4 × 0.4 — where does the decimal point go? (a) 0.0336 (b) 33.6 (c) 0.336 (d) 3.36
  14. 14.2.4 × 7 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 168 (d) 1.68
  15. 15.0.39 × 3 — where does the decimal point go? (a) 11.7 (b) 0.0117 (c) 0.117 (d) 1.17
  16. 16.4.4 × 0.3 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 13.2 (d) 0.0132
  17. 17.0.58 × 0.2 — where does the decimal point go? (a) 1.16 (b) 0.116 (c) 0.00116 (d) 0.0116
  18. 18.3.2 × 0.2 — where does the decimal point go? (a) 0.064 (b) 0.0064 (c) 0.64 (d) 6.4
  19. 19.0.79 × 5 — where does the decimal point go? (a) 39.5 (b) 0.395 (c) 3.95 (d) 0.0395
  20. 20.0.89 × 34 — where does the decimal point go? (a) 0.3026 (b) 302.6 (c) 30.26 (d) 3.026
  21. 21.0.93 × 4.6 — where does the decimal point go? (a) 0.04278 (b) 42.78 (c) 0.4278 (d) 4.278
  22. 22.2.9 × 0.6 — where does the decimal point go? (a) 0.0174 (b) 17.4 (c) 1.74 (d) 0.174
  23. 23.0.94 × 4 — where does the decimal point go? (a) 0.0376 (b) 0.376 (c) 37.6 (d) 3.76
  24. 24.0.74 × 7 — where does the decimal point go? (a) 51.8 (b) 0.518 (c) 5.18 (d) 0.0518
  25. 25.0.27 × 0.5 — where does the decimal point go? (a) 0.135 (b) 1.35 (c) 0.00135 (d) 0.0135
  26. 26.7.9 × 28 — where does the decimal point go? (a) 221.2 (b) 22.12 (c) 2.212 (d) 2212
  27. 27.0.86 × 7 — where does the decimal point go? (a) 6.02 (b) 60.2 (c) 0.0602 (d) 0.602
  28. 28.7.2 × 3 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 216
  29. 29.9.3 × 0.5 — where does the decimal point go? (a) 0.0465 (b) 0.465 (c) 4.65 (d) 46.5
  30. 30.6.5 × 27 — where does the decimal point go? (a) 1755 (b) 1.755 (c) 175.5 (d) 17.55
  31. 31.0.62 × 33 — where does the decimal point go? (a) 2.046 (b) 0.2046 (c) 20.46 (d) 204.6
  32. 32.1.4 × 4.8 — where does the decimal point go? (a) 0.0672 (b) 0.672 (c) 67.2 (d) 6.72
  33. 33.7.1 × 36 — where does the decimal point go? (a) 2556 (b) 2.556 (c) 25.56 (d) 255.6
  34. 34.8.8 × 13 — where does the decimal point go? (a) 1144 (b) 11.44 (c) 1.144 (d) 114.4
  35. 35.0.45 × 39 — where does the decimal point go? (a) 1.755 (b) 175.5 (c) 0.1755 (d) 17.55
  36. 36.8.8 × 0.7 — where does the decimal point go? (a) 61.6 (b) 0.0616 (c) 0.616 (d) 6.16
  37. 37.0.78 × 11 — where does the decimal point go? (a) 0.858 (b) 8.58 (c) 85.8 (d) 0.0858
  38. 38.0.88 × 22 — where does the decimal point go? (a) 19.36 (b) 0.1936 (c) 193.6 (d) 1.936
  39. 39.0.81 × 6 — where does the decimal point go? (a) 0.486 (b) 0.0486 (c) 48.6 (d) 4.86
  40. 40.0.29 × 41 — where does the decimal point go? (a) 118.9 (b) 1.189 (c) 11.89 (d) 0.1189

Answer key

  1. 6.96
  2. 0.264
  3. 3.627
  4. 29.76
  5. 21.7
  6. 2.024
  7. 24.6
  8. 2.94
  9. 22.91
  10. 265.2
  11. 165.9
  12. 0.34
  13. 3.36
  14. 16.8
  15. 1.17
  16. 1.32
  17. 0.116
  18. 0.64
  19. 3.95
  20. 30.26
  21. 4.278
  22. 1.74
  23. 3.76
  24. 5.18
  25. 0.135
  26. 221.2
  27. 6.02
  28. 21.6
  29. 4.65
  30. 175.5
  31. 20.46
  32. 6.72
  33. 255.6
  34. 114.4
  35. 17.55
  36. 6.16
  37. 8.58
  38. 19.36
  39. 4.86
  40. 11.89

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