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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 519 · 40 questions
TalentJR

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

NameDateTime takenScore ___ / 40
  1. 1.31² =
  2. 2.12 × 14 =
  3. 3.₹16.15 + ₹40.35 =
  4. 4.₹51.30 + ₹11.75 =
  5. 5.523 − 69 =
  6. 6.428 − 18 =
  7. 7.1 + 5 + 5 + 9 =
  8. 8.156 + 97 =
  9. 9.13 × 15 =
  10. 10.₹28.35 − ₹3.30 =
  11. 11.5 + 5 + 5 + 2 =
  12. 12.139 + 57 =
  13. 13.Best estimate of 79 × 81? (a) 64000 (b) 12800 (c) 6400 (d) 640
  14. 14.89 + 34 + 83 + 32 =
  15. 15.₹94.50 + ₹41.30 =
  16. 16.Check with nines: 741 + 172 = 913. Correct or wrong? (a) wrong (b) correct
  17. 17.11 × 12 =
  18. 18.48 × 8 =
  19. 19.13 + 63 + 27 + 53 =
  20. 20.₹47.05 + ₹45.05 =
  21. 21.74 + 53 + 33 + 51 =
  22. 22.497 + 17 =
  23. 23.18 × 15 =
  24. 24.24 × 15 =
  25. 25.201 − 18 =
  26. 26.₹10.20 + ₹36.95 =
  27. 27.19² =
  28. 28.5 + 6 + 5 + 2 =
  29. 29.235 − 57 =
  30. 30.29² =
  31. 31.4 + 6 + 4 + 6 =
  32. 32.₹92.10 + ₹26.70 =
  33. 33.19 × 8 =
  34. 34.7 × 15 =
  35. 35.19 × 19 =
  36. 36.8 + 8 + 1 + 2 + 8 =
  37. 37.153 − 17 =
  38. 38.202 − 78 =
  39. 39.Check with nines: 846 + 325 = 1170. Correct or wrong? (a) wrong (b) correct
  40. 40.19 × 18 =

Answer key

  1. 961
  2. 168
  3. 56.5
  4. 63.05
  5. 454
  6. 410
  7. 20
  8. 253
  9. 195
  10. 25.05
  11. 17
  12. 196
  13. 6400
  14. 238
  15. 135.8
  16. correct
  17. 132
  18. 384
  19. 156
  20. 92.1
  21. 211
  22. 514
  23. 270
  24. 360
  25. 183
  26. 47.15
  27. 361
  28. 18
  29. 178
  30. 841
  31. 20
  32. 118.8
  33. 152
  34. 105
  35. 361
  36. 27
  37. 136
  38. 124
  39. wrong
  40. 342

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