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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 875 · 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. 1.0.23 × 5 — where does the decimal point go? (a) 0.115 (b) 1.15 (c) 0.0115 (d) 11.5
  2. 2.7.8 × 2.1 — where does the decimal point go? (a) 0.1638 (b) 1.638 (c) 16.38 (d) 163.8
  3. 3.7.3 × 36 — where does the decimal point go? (a) 26.28 (b) 2.628 (c) 2628 (d) 262.8
  4. 4.0.73 × 7 — where does the decimal point go? (a) 5.11 (b) 0.511 (c) 51.1 (d) 0.0511
  5. 5.0.92 × 8 — where does the decimal point go? (a) 0.0736 (b) 0.736 (c) 73.6 (d) 7.36
  6. 6.0.27 × 33 — where does the decimal point go? (a) 8.91 (b) 0.0891 (c) 0.891 (d) 89.1
  7. 7.5.3 × 0.6 — where does the decimal point go? (a) 31.8 (b) 0.318 (c) 0.0318 (d) 3.18
  8. 8.0.79 × 4 — where does the decimal point go? (a) 0.0316 (b) 31.6 (c) 3.16 (d) 0.316
  9. 9.7.4 × 0.8 — where does the decimal point go? (a) 5.92 (b) 0.0592 (c) 0.592 (d) 59.2
  10. 10.6.7 × 3 — where does the decimal point go? (a) 201 (b) 2.01 (c) 0.201 (d) 20.1
  11. 11.7.5 × 7 — where does the decimal point go? (a) 525 (b) 52.5 (c) 0.525 (d) 5.25
  12. 12.6.9 × 3.4 — where does the decimal point go? (a) 0.2346 (b) 2.346 (c) 23.46 (d) 234.6
  13. 13.0.69 × 0.5 — where does the decimal point go? (a) 3.45 (b) 0.345 (c) 0.00345 (d) 0.0345
  14. 14.1.9 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.0076 (c) 7.6 (d) 0.076
  15. 15.4.2 × 0.3 — where does the decimal point go? (a) 12.6 (b) 0.0126 (c) 0.126 (d) 1.26
  16. 16.9.2 × 2 — where does the decimal point go? (a) 184 (b) 0.184 (c) 1.84 (d) 18.4
  17. 17.0.17 × 0.2 — where does the decimal point go? (a) 0.34 (b) 0.00034 (c) 0.034 (d) 0.0034
  18. 18.9.6 × 4 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 3.84 (d) 384
  19. 19.0.96 × 4 — where does the decimal point go? (a) 3.84 (b) 0.0384 (c) 0.384 (d) 38.4
  20. 20.7.3 × 2.4 — where does the decimal point go? (a) 17.52 (b) 1.752 (c) 175.2 (d) 0.1752
  21. 21.7.4 × 47 — where does the decimal point go? (a) 3.478 (b) 3478 (c) 34.78 (d) 347.8
  22. 22.9.5 × 25 — where does the decimal point go? (a) 2.375 (b) 237.5 (c) 23.75 (d) 2375
  23. 23.0.64 × 0.9 — where does the decimal point go? (a) 0.576 (b) 5.76 (c) 0.00576 (d) 0.0576
  24. 24.0.12 × 1.8 — where does the decimal point go? (a) 2.16 (b) 0.0216 (c) 0.00216 (d) 0.216
  25. 25.0.16 × 29 — where does the decimal point go? (a) 4.64 (b) 0.0464 (c) 46.4 (d) 0.464
  26. 26.9.4 × 9 — where does the decimal point go? (a) 8.46 (b) 0.846 (c) 846 (d) 84.6
  27. 27.3.8 × 0.3 — where does the decimal point go? (a) 0.114 (b) 11.4 (c) 0.0114 (d) 1.14
  28. 28.0.41 × 0.9 — where does the decimal point go? (a) 0.0369 (b) 0.369 (c) 0.00369 (d) 3.69
  29. 29.4.8 × 0.2 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 0.096 (d) 0.0096
  30. 30.3.7 × 5 — where does the decimal point go? (a) 1.85 (b) 185 (c) 0.185 (d) 18.5
  31. 31.7.2 × 46 — where does the decimal point go? (a) 3312 (b) 33.12 (c) 3.312 (d) 331.2
  32. 32.8.9 × 7 — where does the decimal point go? (a) 62.3 (b) 0.623 (c) 6.23 (d) 623
  33. 33.6.9 × 0.8 — where does the decimal point go? (a) 0.0552 (b) 5.52 (c) 0.552 (d) 55.2
  34. 34.0.15 × 1.1 — where does the decimal point go? (a) 1.65 (b) 0.165 (c) 0.0165 (d) 0.00165
  35. 35.0.13 × 39 — where does the decimal point go? (a) 5.07 (b) 0.0507 (c) 50.7 (d) 0.507
  36. 36.9.8 × 2 — where does the decimal point go? (a) 0.196 (b) 196 (c) 1.96 (d) 19.6
  37. 37.4.4 × 1.2 — where does the decimal point go? (a) 0.528 (b) 5.28 (c) 0.0528 (d) 52.8
  38. 38.1.9 × 21 — where does the decimal point go? (a) 3.99 (b) 39.9 (c) 399 (d) 0.399
  39. 39.0.72 × 1.3 — where does the decimal point go? (a) 9.36 (b) 0.0936 (c) 0.00936 (d) 0.936
  40. 40.2.2 × 46 — where does the decimal point go? (a) 10.12 (b) 101.2 (c) 1.012 (d) 1012

Answer key

  1. 1.15
  2. 16.38
  3. 262.8
  4. 5.11
  5. 7.36
  6. 8.91
  7. 3.18
  8. 3.16
  9. 5.92
  10. 20.1
  11. 52.5
  12. 23.46
  13. 0.345
  14. 0.76
  15. 1.26
  16. 18.4
  17. 0.034
  18. 38.4
  19. 3.84
  20. 17.52
  21. 347.8
  22. 237.5
  23. 0.576
  24. 0.216
  25. 4.64
  26. 84.6
  27. 1.14
  28. 0.369
  29. 0.96
  30. 18.5
  31. 331.2
  32. 62.3
  33. 5.52
  34. 0.165
  35. 5.07
  36. 19.6
  37. 5.28
  38. 39.9
  39. 0.936
  40. 101.2

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