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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 377 · 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 × 19 =
  2. 2.Best estimate of 203 × 9? (a) 1800 (b) 18000 (c) 3600 (d) 180
  3. 3.21 × 8 =
  4. 4.38 × 15 =
  5. 5.15 × 11 =
  6. 6.41² =
  7. 7.Best estimate of 899 × 8? (a) 72000 (b) 720 (c) 7200 (d) 14400
  8. 8.15 × 11 =
  9. 9.24 × 15 =
  10. 10.675 ÷ 25 =
  11. 11.210 ÷ 5 =
  12. 12.472 + 37 =
  13. 13.Check with nines: 75 × 18 = 1350. Correct or wrong? (a) wrong (b) correct
  14. 14.13 × 50 =
  15. 15.15% of 340 =
  16. 16.11 × 13 =
  17. 17.379 + 87 =
  18. 18.Check with nines: 29 × 15 = 435. Correct or wrong? (a) correct (b) wrong
  19. 19.25% of 40 =
  20. 20.85 − 18 =
  21. 21.10% of 860 =
  22. 22.150 × 4 =
  23. 23.548 − 59 =
  24. 24.475 ÷ 5 =
  25. 25.212 + 39 =
  26. 26.26 × 8 =
  27. 27.495 − 97 =
  28. 28.15% of 720 =
  29. 29.308 − 97 =
  30. 30.341 − 36 =
  31. 31.155 ÷ 5 =
  32. 32.212 + 17 =
  33. 33.21 × 4 =
  34. 34.47 × 15 =
  35. 35.15% of 410 =
  36. 36.62 × 5 =
  37. 37.12 × 19 =
  38. 38.8 + 8 + 2 + 3 =
  39. 39.184 + 47 =
  40. 40.377 + 67 =

Answer key

  1. 361
  2. 1800
  3. 168
  4. 570
  5. 165
  6. 1681
  7. 7200
  8. 165
  9. 360
  10. 27
  11. 42
  12. 509
  13. correct
  14. 650
  15. 51
  16. 143
  17. 466
  18. correct
  19. 10
  20. 67
  21. 86
  22. 600
  23. 489
  24. 95
  25. 251
  26. 208
  27. 398
  28. 108
  29. 211
  30. 305
  31. 31
  32. 229
  33. 84
  34. 705
  35. 61.5
  36. 310
  37. 228
  38. 21
  39. 231
  40. 444

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