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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 163 · 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. 1.0.26 × 18 — where does the decimal point go? (a) 46.8 (b) 0.468 (c) 0.0468 (d) 4.68
  2. 2.4.8 × 1.8 — where does the decimal point go? (a) 8.64 (b) 0.864 (c) 86.4 (d) 0.0864
  3. 3.0.96 × 4.1 — where does the decimal point go? (a) 0.3936 (b) 39.36 (c) 0.03936 (d) 3.936
  4. 4.0.59 × 2.6 — where does the decimal point go? (a) 0.1534 (b) 15.34 (c) 1.534 (d) 0.01534
  5. 5.0.32 × 1.6 — where does the decimal point go? (a) 0.512 (b) 5.12 (c) 0.00512 (d) 0.0512
  6. 6.0.58 × 2.3 — where does the decimal point go? (a) 13.34 (b) 1.334 (c) 0.1334 (d) 0.01334
  7. 7.5.5 × 7 — where does the decimal point go? (a) 3.85 (b) 0.385 (c) 385 (d) 38.5
  8. 8.0.65 × 9 — where does the decimal point go? (a) 5.85 (b) 0.0585 (c) 58.5 (d) 0.585
  9. 9.2.5 × 0.7 — where does the decimal point go? (a) 1.75 (b) 0.175 (c) 0.0175 (d) 17.5
  10. 10.0.28 × 0.3 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 0.084 (d) 0.00084
  11. 11.0.72 × 1.8 — where does the decimal point go? (a) 0.1296 (b) 12.96 (c) 0.01296 (d) 1.296
  12. 12.8.8 × 3 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 264 (d) 2.64
  13. 13.0.47 × 4 — where does the decimal point go? (a) 18.8 (b) 0.0188 (c) 1.88 (d) 0.188
  14. 14.8.7 × 15 — where does the decimal point go? (a) 130.5 (b) 13.05 (c) 1305 (d) 1.305
  15. 15.0.19 × 9 — where does the decimal point go? (a) 1.71 (b) 0.171 (c) 0.0171 (d) 17.1
  16. 16.8.2 × 32 — where does the decimal point go? (a) 26.24 (b) 262.4 (c) 2.624 (d) 2624
  17. 17.1.4 × 0.3 — where does the decimal point go? (a) 0.042 (b) 4.2 (c) 0.0042 (d) 0.42
  18. 18.2.8 × 4 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 112 (d) 0.112
  19. 19.0.71 × 3 — where does the decimal point go? (a) 21.3 (b) 2.13 (c) 0.213 (d) 0.0213
  20. 20.0.13 × 6 — where does the decimal point go? (a) 0.078 (b) 0.0078 (c) 7.8 (d) 0.78
  21. 21.4.1 × 0.9 — where does the decimal point go? (a) 0.369 (b) 36.9 (c) 3.69 (d) 0.0369
  22. 22.9.7 × 6 — where does the decimal point go? (a) 0.582 (b) 582 (c) 58.2 (d) 5.82
  23. 23.6.3 × 2.6 — where does the decimal point go? (a) 163.8 (b) 16.38 (c) 1.638 (d) 0.1638
  24. 24.0.91 × 22 — where does the decimal point go? (a) 0.2002 (b) 2.002 (c) 20.02 (d) 200.2
  25. 25.0.97 × 12 — where does the decimal point go? (a) 11.64 (b) 1.164 (c) 116.4 (d) 0.1164
  26. 26.0.33 × 4 — where does the decimal point go? (a) 13.2 (b) 0.132 (c) 1.32 (d) 0.0132
  27. 27.4.6 × 27 — where does the decimal point go? (a) 124.2 (b) 12.42 (c) 1242 (d) 1.242
  28. 28.5.1 × 4.1 — where does the decimal point go? (a) 2.091 (b) 20.91 (c) 0.2091 (d) 209.1
  29. 29.2.6 × 0.4 — where does the decimal point go? (a) 1.04 (b) 0.104 (c) 10.4 (d) 0.0104
  30. 30.0.43 × 36 — where does the decimal point go? (a) 1.548 (b) 0.1548 (c) 154.8 (d) 15.48
  31. 31.8.2 × 0.6 — where does the decimal point go? (a) 0.0492 (b) 0.492 (c) 49.2 (d) 4.92
  32. 32.0.77 × 8 — where does the decimal point go? (a) 0.0616 (b) 0.616 (c) 61.6 (d) 6.16
  33. 33.0.59 × 2.1 — where does the decimal point go? (a) 0.1239 (b) 12.39 (c) 1.239 (d) 0.01239
  34. 34.0.72 × 48 — where does the decimal point go? (a) 3.456 (b) 0.3456 (c) 34.56 (d) 345.6
  35. 35.0.46 × 6 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 0.276 (d) 0.0276
  36. 36.3.2 × 41 — where does the decimal point go? (a) 131.2 (b) 1312 (c) 13.12 (d) 1.312
  37. 37.8.2 × 3 — where does the decimal point go? (a) 246 (b) 2.46 (c) 24.6 (d) 0.246
  38. 38.6.2 × 0.7 — where does the decimal point go? (a) 4.34 (b) 43.4 (c) 0.434 (d) 0.0434
  39. 39.0.87 × 2.2 — where does the decimal point go? (a) 19.14 (b) 0.01914 (c) 1.914 (d) 0.1914
  40. 40.2.9 × 0.5 — where does the decimal point go? (a) 0.145 (b) 1.45 (c) 0.0145 (d) 14.5

Answer key

  1. 4.68
  2. 8.64
  3. 3.936
  4. 1.534
  5. 0.512
  6. 1.334
  7. 38.5
  8. 5.85
  9. 1.75
  10. 0.084
  11. 1.296
  12. 26.4
  13. 1.88
  14. 130.5
  15. 1.71
  16. 262.4
  17. 0.42
  18. 11.2
  19. 2.13
  20. 0.78
  21. 3.69
  22. 58.2
  23. 16.38
  24. 20.02
  25. 11.64
  26. 1.32
  27. 124.2
  28. 20.91
  29. 1.04
  30. 15.48
  31. 4.92
  32. 6.16
  33. 1.239
  34. 34.56
  35. 2.76
  36. 131.2
  37. 24.6
  38. 4.34
  39. 1.914
  40. 1.45

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