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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 21 · 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. 1.6 + 6 + 4 + 2 =
  2. 2.21² =
  3. 3.Best estimate of 499 × 8? (a) 4000 (b) 40000 (c) 400 (d) 8000
  4. 4.13 × 8 =
  5. 5.Check with nines: 505 + 806 = 1312. Correct or wrong? (a) correct (b) wrong
  6. 6.57 + 44 + 70 + 82 =
  7. 7.162 + 88 =
  8. 8.156 − 98 =
  9. 9.39² =
  10. 10.7 + 4 + 5 + 6 + 7 =
  11. 11.₹17.95 + ₹15.70 =
  12. 12.18 × 12 =
  13. 13.29² =
  14. 14.2 + 9 + 6 + 8 =
  15. 15.34 × 4 =
  16. 16.510 − 78 =
  17. 17.27 × 4 =
  18. 18.50% of 210 =
  19. 19.13 × 5 =
  20. 20.251 − 36 =
  21. 21.65 × 8 =
  22. 22.10% of 260 =
  23. 23.25 + 44 + 31 + 33 =
  24. 24.₹22.75 + ₹44.40 =
  25. 25.6 + 6 + 7 + 9 + 4 =
  26. 26.7 + 3 + 4 + 2 =
  27. 27.51² =
  28. 28.105 + 57 =
  29. 29.Check with nines: 95 × 31 = 2945. Correct or wrong? (a) wrong (b) correct
  30. 30.550 − 48 =
  31. 31.90 × 5 =
  32. 32.Check with nines: 83 × 17 = 1405. Correct or wrong? (a) correct (b) wrong
  33. 33.83 + 58 + 18 + 58 =
  34. 34.31 + 43 + 49 + 86 =
  35. 35.₹23.75 + ₹13.20 =
  36. 36.19 × 16 =
  37. 37.20% of 880 =
  38. 38.9 + 9 + 4 + 1 =
  39. 39.₹9.35 + ₹23.20 =
  40. 40.71² =

Answer key

  1. 18
  2. 441
  3. 4000
  4. 104
  5. wrong
  6. 253
  7. 250
  8. 58
  9. 1521
  10. 29
  11. 33.65
  12. 216
  13. 841
  14. 25
  15. 136
  16. 432
  17. 108
  18. 105
  19. 65
  20. 215
  21. 520
  22. 26
  23. 133
  24. 67.15
  25. 32
  26. 16
  27. 2601
  28. 162
  29. correct
  30. 502
  31. 450
  32. wrong
  33. 217
  34. 209
  35. 36.95
  36. 304
  37. 176
  38. 23
  39. 32.55
  40. 5041

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