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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 14 · 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. 1.19² =
  2. 2.97 × 5 =
  3. 3.Check with nines: 22 × 41 = 901. Correct or wrong? (a) correct (b) wrong
  4. 4.47 × 15 =
  5. 5.23 × 5 =
  6. 6.41² =
  7. 7.71² =
  8. 8.396 − 16 =
  9. 9.368 − 39 =
  10. 10.20% of 320 =
  11. 11.11 × 13 =
  12. 12.37 × 15 =
  13. 13.123 − 58 =
  14. 14.39² =
  15. 15.Best estimate of 32 × 88? (a) 2700 (b) 270 (c) 5400 (d) 27000
  16. 16.546 − 69 =
  17. 17.21 × 50 =
  18. 18.350 ÷ 50 =
  19. 19.51² =
  20. 20.Best estimate of 31 × 71? (a) 4200 (b) 2100 (c) 210 (d) 21000
  21. 21.19 × 13 =
  22. 22.Best estimate of 32 × 89? (a) 5400 (b) 270 (c) 27000 (d) 2700
  23. 23.Best estimate of 62 × 31? (a) 180 (b) 3600 (c) 18000 (d) 1800
  24. 24.₹81.25 + ₹37.85 =
  25. 25.91² =
  26. 26.5% of 110 =
  27. 27.Check with nines: 74 × 20 = 1474. Correct or wrong? (a) correct (b) wrong
  28. 28.12 × 15 =
  29. 29.173 − 89 =
  30. 30.275 ÷ 25 =
  31. 31.88 + 61 + 66 + 54 =
  32. 32.71² =
  33. 33.₹95.20 + ₹42.40 =
  34. 34.10 × 15 =
  35. 35.478 + 49 =
  36. 36.87 × 4 =
  37. 37.24 × 15 =
  38. 38.475 ÷ 5 =
  39. 39.31 + 27 + 67 + 27 =
  40. 40.₹31.60 + ₹41.75 =

Answer key

  1. 361
  2. 485
  3. wrong
  4. 705
  5. 115
  6. 1681
  7. 5041
  8. 380
  9. 329
  10. 64
  11. 143
  12. 555
  13. 65
  14. 1521
  15. 2700
  16. 477
  17. 1050
  18. 7
  19. 2601
  20. 2100
  21. 247
  22. 2700
  23. 1800
  24. 119.1
  25. 8281
  26. 5.5
  27. wrong
  28. 180
  29. 84
  30. 11
  31. 269
  32. 5041
  33. 137.6
  34. 150
  35. 527
  36. 348
  37. 360
  38. 95
  39. 152
  40. 73.35

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