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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 230 · 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.Best estimate of 202 × 3? (a) 1200 (b) 60 (c) 600 (d) 6000
  2. 2.₹91.85 + ₹2.35 =
  3. 3.17 × 15 =
  4. 4.800 ÷ 50 =
  5. 5.17 + 31 + 66 + 66 =
  6. 6.159 − 99 =
  7. 7.17 × 17 =
  8. 8.₹95.45 + ₹2.15 =
  9. 9.15% of 150 =
  10. 10.205 + 37 =
  11. 11.1 + 7 + 2 + 8 =
  12. 12.3 + 8 + 6 + 2 =
  13. 13.558 − 86 =
  14. 14.45 × 15 =
  15. 15.Best estimate of 501 × 4? (a) 20000 (b) 200 (c) 4000 (d) 2000
  16. 16.35 × 15 =
  17. 17.29 + 20 + 57 + 21 =
  18. 18.₹63.20 + ₹43.55 =
  19. 19.1 + 9 + 9 + 1 + 1 =
  20. 20.Check with nines: 349 + 859 = 1208. Correct or wrong? (a) correct (b) wrong
  21. 21.57 + 76 + 26 + 63 =
  22. 22.₹63.35 − ₹12.35 =
  23. 23.39² =
  24. 24.Check with nines: 88 × 36 = 3168. Correct or wrong? (a) correct (b) wrong
  25. 25.18 × 17 =
  26. 26.18 × 12 =
  27. 27.59² =
  28. 28.307 + 39 =
  29. 29.4 × 15 =
  30. 30.42 × 15 =
  31. 31.10% of 30 =
  32. 32.15% of 510 =
  33. 33.62 × 15 =
  34. 34.64 + 49 =
  35. 35.84 + 83 + 27 + 19 =
  36. 36.12 × 14 =
  37. 37.50% of 90 =
  38. 38.573 − 26 =
  39. 39.₹56.45 + ₹25.60 =
  40. 40.497 + 58 =

Answer key

  1. 600
  2. 94.2
  3. 255
  4. 16
  5. 180
  6. 60
  7. 289
  8. 97.6
  9. 22.5
  10. 242
  11. 18
  12. 19
  13. 472
  14. 675
  15. 2000
  16. 525
  17. 127
  18. 106.75
  19. 21
  20. correct
  21. 222
  22. 51
  23. 1521
  24. correct
  25. 306
  26. 216
  27. 3481
  28. 346
  29. 60
  30. 630
  31. 3
  32. 76.5
  33. 930
  34. 113
  35. 213
  36. 168
  37. 45
  38. 547
  39. 82.05
  40. 555

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