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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 194 · 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 103 × 6? (a) 6000 (b) 60 (c) 1200 (d) 600
  2. 2.18 × 15 =
  3. 3.75 × 50 =
  4. 4.51 × 15 =
  5. 5.98 × 50 =
  6. 6.285 − 66 =
  7. 7.266 − 17 =
  8. 8.22 × 4 =
  9. 9.35 × 4 =
  10. 10.₹28.80 + ₹40.25 =
  11. 11.Best estimate of 92 × 19? (a) 180 (b) 3600 (c) 18000 (d) 1800
  12. 12.39² =
  13. 13.20% of 240 =
  14. 14.Check with nines: 382 + 648 = 1031. Correct or wrong? (a) correct (b) wrong
  15. 15.50% of 20 =
  16. 16.10% of 730 =
  17. 17.348 − 18 =
  18. 18.91² =
  19. 19.9 + 9 + 1 + 7 + 1 =
  20. 20.269 − 69 =
  21. 21.13 × 19 =
  22. 22.67 − 46 =
  23. 23.218 + 77 =
  24. 24.213 + 89 =
  25. 25.8 + 6 + 2 + 7 + 4 =
  26. 26.7 × 15 =
  27. 27.Check with nines: 131 + 821 = 951. Correct or wrong? (a) wrong (b) correct
  28. 28.15 × 5 =
  29. 29.490 ÷ 5 =
  30. 30.106 × 4 =
  31. 31.32 × 5 =
  32. 32.61² =
  33. 33.Check with nines: 86 × 99 = 8514. Correct or wrong? (a) correct (b) wrong
  34. 34.18 × 5 =
  35. 35.435 − 48 =
  36. 36.14 × 17 =
  37. 37.₹8.20 − ₹7.90 =
  38. 38.125 − 96 =
  39. 39.15 × 14 =
  40. 40.505 − 46 =

Answer key

  1. 600
  2. 270
  3. 3750
  4. 765
  5. 4900
  6. 219
  7. 249
  8. 88
  9. 140
  10. 69.05
  11. 1800
  12. 1521
  13. 48
  14. wrong
  15. 10
  16. 73
  17. 330
  18. 8281
  19. 27
  20. 200
  21. 247
  22. 21
  23. 295
  24. 302
  25. 27
  26. 105
  27. wrong
  28. 75
  29. 98
  30. 424
  31. 160
  32. 3721
  33. correct
  34. 90
  35. 387
  36. 238
  37. 0.3
  38. 29
  39. 210
  40. 459

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