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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 300 · 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. 1.46 × 8 =
  2. 2.1125 ÷ 25 =
  3. 3.453 − 48 =
  4. 4.587 − 48 =
  5. 5.171 − 18 =
  6. 6.₹73.80 + ₹5.10 =
  7. 7.10% of 490 =
  8. 8.43 × 15 =
  9. 9.191 − 98 =
  10. 10.45 + 88 + 64 + 29 =
  11. 11.1250 ÷ 25 =
  12. 12.Best estimate of 797 × 3? (a) 4800 (b) 24000 (c) 240 (d) 2400
  13. 13.20% of 600 =
  14. 14.208 − 46 =
  15. 15.Best estimate of 71 × 21? (a) 14000 (b) 140 (c) 1400 (d) 2800
  16. 16.87 × 4 =
  17. 17.19 × 18 =
  18. 18.Check with nines: 186 + 219 = 405. Correct or wrong? (a) correct (b) wrong
  19. 19.10% of 410 =
  20. 20.22 × 5 =
  21. 21.1600 ÷ 50 =
  22. 22.17 × 5 =
  23. 23.380 − 67 =
  24. 24.69² =
  25. 25.225 ÷ 25 =
  26. 26.569 − 76 =
  27. 27.1350 ÷ 25 =
  28. 28.88 × 4 =
  29. 29.31² =
  30. 30.49 + 15 + 30 + 61 =
  31. 31.17 × 4 =
  32. 32.1 + 1 + 5 + 9 =
  33. 33.383 − 79 =
  34. 34.69² =
  35. 35.58 × 15 =
  36. 36.Check with nines: 74 × 26 = 1924. Correct or wrong? (a) correct (b) wrong
  37. 37.88 × 50 =
  38. 38.₹53.30 + ₹34.10 =
  39. 39.30 + 49 + 47 + 27 =
  40. 40.15 + 26 + 37 + 77 =

Answer key

  1. 368
  2. 45
  3. 405
  4. 539
  5. 153
  6. 78.9
  7. 49
  8. 645
  9. 93
  10. 226
  11. 50
  12. 2400
  13. 120
  14. 162
  15. 1400
  16. 348
  17. 342
  18. correct
  19. 41
  20. 110
  21. 32
  22. 85
  23. 313
  24. 4761
  25. 9
  26. 493
  27. 54
  28. 352
  29. 961
  30. 155
  31. 68
  32. 16
  33. 304
  34. 4761
  35. 870
  36. correct
  37. 4400
  38. 87.4
  39. 153
  40. 155

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