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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 99 · 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.₹19.80 − ₹16.80 =
  2. 2.6 + 3 + 9 + 4 + 6 =
  3. 3.79² =
  4. 4.39² =
  5. 5.29² =
  6. 6.275 ÷ 5 =
  7. 7.20% of 470 =
  8. 8.18 × 15 =
  9. 9.₹51.50 − ₹10.90 =
  10. 10.Check with nines: 40 × 60 = 2400. Correct or wrong? (a) correct (b) wrong
  11. 11.84 − 18 =
  12. 12.Best estimate of 68 × 82? (a) 560 (b) 5600 (c) 56000 (d) 11200
  13. 13.8 + 2 + 2 + 8 =
  14. 14.246 + 59 =
  15. 15.9 + 1 + 4 + 1 =
  16. 16.12 × 12 =
  17. 17.87 × 5 =
  18. 18.₹76.50 − ₹10.95 =
  19. 19.548 − 46 =
  20. 20.1 + 2 + 9 + 5 =
  21. 21.178 − 16 =
  22. 22.235 + 68 =
  23. 23.95 × 50 =
  24. 24.41² =
  25. 25.Check with nines: 12 × 95 = 1140. Correct or wrong? (a) correct (b) wrong
  26. 26.79² =
  27. 27.47 + 58 + 70 + 16 =
  28. 28.53 + 68 =
  29. 29.19 × 16 =
  30. 30.₹98.95 + ₹42.95 =
  31. 31.15 × 13 =
  32. 32.18 × 13 =
  33. 33.14 × 15 =
  34. 34.1350 ÷ 25 =
  35. 35.22 × 8 =
  36. 36.79² =
  37. 37.Check with nines: 808 + 174 = 978. Correct or wrong? (a) correct (b) wrong
  38. 38.16 × 17 =
  39. 39.71 + 59 + 29 + 85 =
  40. 40.21 × 15 =

Answer key

  1. 3
  2. 28
  3. 6241
  4. 1521
  5. 841
  6. 55
  7. 94
  8. 270
  9. 40.6
  10. correct
  11. 66
  12. 5600
  13. 20
  14. 305
  15. 15
  16. 144
  17. 435
  18. 65.55
  19. 502
  20. 17
  21. 162
  22. 303
  23. 4750
  24. 1681
  25. correct
  26. 6241
  27. 191
  28. 121
  29. 304
  30. 141.9
  31. 195
  32. 234
  33. 210
  34. 54
  35. 176
  36. 6241
  37. wrong
  38. 272
  39. 244
  40. 315

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