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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 1 · 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. 1.0.45 × 3 — where does the decimal point go? (a) 0.135 (b) 0.0135 (c) 1.35 (d) 13.5
  2. 2.8.9 × 4.9 — where does the decimal point go? (a) 43.61 (b) 436.1 (c) 4.361 (d) 0.4361
  3. 3.0.72 × 0.4 — where does the decimal point go? (a) 0.288 (b) 0.00288 (c) 0.0288 (d) 2.88
  4. 4.0.26 × 1.7 — where does the decimal point go? (a) 0.442 (b) 0.0442 (c) 4.42 (d) 0.00442
  5. 5.4.8 × 0.9 — where does the decimal point go? (a) 0.0432 (b) 4.32 (c) 0.432 (d) 43.2
  6. 6.0.63 × 21 — where does the decimal point go? (a) 13.23 (b) 1.323 (c) 0.1323 (d) 132.3
  7. 7.8.1 × 32 — where does the decimal point go? (a) 259.2 (b) 25.92 (c) 2592 (d) 2.592
  8. 8.2.7 × 9 — where does the decimal point go? (a) 24.3 (b) 2.43 (c) 0.243 (d) 243
  9. 9.5.8 × 39 — where does the decimal point go? (a) 226.2 (b) 22.62 (c) 2.262 (d) 2262
  10. 10.0.44 × 43 — where does the decimal point go? (a) 18.92 (b) 1.892 (c) 0.1892 (d) 189.2
  11. 11.9.9 × 1.7 — where does the decimal point go? (a) 1.683 (b) 168.3 (c) 0.1683 (d) 16.83
  12. 12.0.87 × 0.8 — where does the decimal point go? (a) 0.696 (b) 6.96 (c) 0.0696 (d) 0.00696
  13. 13.0.73 × 4 — where does the decimal point go? (a) 0.292 (b) 2.92 (c) 0.0292 (d) 29.2
  14. 14.1.9 × 0.9 — where does the decimal point go? (a) 0.0171 (b) 0.171 (c) 1.71 (d) 17.1
  15. 15.0.93 × 0.4 — where does the decimal point go? (a) 0.0372 (b) 0.00372 (c) 3.72 (d) 0.372
  16. 16.2.3 × 0.5 — where does the decimal point go? (a) 0.0115 (b) 0.115 (c) 1.15 (d) 11.5
  17. 17.1.4 × 4.4 — where does the decimal point go? (a) 6.16 (b) 0.0616 (c) 61.6 (d) 0.616
  18. 18.0.92 × 8 — where does the decimal point go? (a) 7.36 (b) 0.0736 (c) 73.6 (d) 0.736
  19. 19.0.36 × 1.1 — where does the decimal point go? (a) 0.396 (b) 0.0396 (c) 3.96 (d) 0.00396
  20. 20.3.7 × 0.9 — where does the decimal point go? (a) 0.333 (b) 3.33 (c) 0.0333 (d) 33.3
  21. 21.0.64 × 0.6 — where does the decimal point go? (a) 0.00384 (b) 0.384 (c) 0.0384 (d) 3.84
  22. 22.9.6 × 2.8 — where does the decimal point go? (a) 2.688 (b) 0.2688 (c) 268.8 (d) 26.88
  23. 23.2.7 × 1.4 — where does the decimal point go? (a) 0.378 (b) 0.0378 (c) 3.78 (d) 37.8
  24. 24.7.6 × 2 — where does the decimal point go? (a) 152 (b) 0.152 (c) 1.52 (d) 15.2
  25. 25.2.1 × 3 — where does the decimal point go? (a) 63 (b) 0.063 (c) 0.63 (d) 6.3
  26. 26.0.32 × 0.4 — where does the decimal point go? (a) 0.128 (b) 0.0128 (c) 0.00128 (d) 1.28
  27. 27.9.3 × 4 — where does the decimal point go? (a) 3.72 (b) 0.372 (c) 37.2 (d) 372
  28. 28.5.2 × 17 — where does the decimal point go? (a) 884 (b) 88.4 (c) 0.884 (d) 8.84
  29. 29.0.29 × 9 — where does the decimal point go? (a) 2.61 (b) 0.261 (c) 0.0261 (d) 26.1
  30. 30.2.7 × 0.7 — where does the decimal point go? (a) 18.9 (b) 1.89 (c) 0.0189 (d) 0.189
  31. 31.0.97 × 5 — where does the decimal point go? (a) 0.0485 (b) 0.485 (c) 4.85 (d) 48.5
  32. 32.0.88 × 37 — where does the decimal point go? (a) 0.3256 (b) 325.6 (c) 3.256 (d) 32.56
  33. 33.4.9 × 4 — where does the decimal point go? (a) 1.96 (b) 19.6 (c) 0.196 (d) 196
  34. 34.0.58 × 3 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 1.74 (d) 0.0174
  35. 35.8.1 × 0.6 — where does the decimal point go? (a) 0.0486 (b) 0.486 (c) 4.86 (d) 48.6
  36. 36.5.2 × 42 — where does the decimal point go? (a) 2.184 (b) 218.4 (c) 21.84 (d) 2184
  37. 37.3.3 × 14 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 462 (d) 4.62
  38. 38.0.66 × 0.4 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 2.64 (d) 0.00264
  39. 39.7.4 × 0.2 — where does the decimal point go? (a) 1.48 (b) 14.8 (c) 0.148 (d) 0.0148
  40. 40.1.7 × 16 — where does the decimal point go? (a) 0.272 (b) 272 (c) 2.72 (d) 27.2

Answer key

  1. 1.35
  2. 43.61
  3. 0.288
  4. 0.442
  5. 4.32
  6. 13.23
  7. 259.2
  8. 24.3
  9. 226.2
  10. 18.92
  11. 16.83
  12. 0.696
  13. 2.92
  14. 1.71
  15. 0.372
  16. 1.15
  17. 6.16
  18. 7.36
  19. 0.396
  20. 3.33
  21. 0.384
  22. 26.88
  23. 3.78
  24. 15.2
  25. 6.3
  26. 0.128
  27. 37.2
  28. 88.4
  29. 2.61
  30. 1.89
  31. 4.85
  32. 32.56
  33. 19.6
  34. 1.74
  35. 4.86
  36. 218.4
  37. 46.2
  38. 0.264
  39. 1.48
  40. 27.2

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