← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 16 · 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. 1.39² =
  2. 2.915 ÷ 5 =
  3. 3.12 × 15 =
  4. 4.16 × 8 =
  5. 5.73 + 30 + 29 + 76 =
  6. 6.16 × 14 =
  7. 7.1% of 410 =
  8. 8.Best estimate of 59 × 88? (a) 10800 (b) 54000 (c) 540 (d) 5400
  9. 9.77 − 17 =
  10. 10.14 × 11 =
  11. 11.151 − 19 =
  12. 12.25 + 61 + 61 + 83 =
  13. 13.2 + 3 + 3 + 8 =
  14. 14.137 − 86 =
  15. 15.14 × 8 =
  16. 16.83 + 16 + 41 + 84 =
  17. 17.42 + 18 =
  18. 18.5% of 530 =
  19. 19.5% of 830 =
  20. 20.Check with nines: 525 + 321 = 850. Correct or wrong? (a) correct (b) wrong
  21. 21.51² =
  22. 22.112 − 99 =
  23. 23.1325 ÷ 25 =
  24. 24.18 × 18 =
  25. 25.27 × 4 =
  26. 26.1600 ÷ 50 =
  27. 27.18 × 14 =
  28. 28.19 × 5 =
  29. 29.6 + 8 + 4 + 8 =
  30. 30.12 × 19 =
  31. 31.31 × 8 =
  32. 32.81² =
  33. 33.239 + 68 =
  34. 34.1 + 9 + 7 + 9 + 6 =
  35. 35.Best estimate of 28 × 61? (a) 1800 (b) 3600 (c) 180 (d) 18000
  36. 36.306 + 19 =
  37. 37.52 × 8 =
  38. 38.5% of 830 =
  39. 39.Check with nines: 45 × 16 = 725. Correct or wrong? (a) wrong (b) correct
  40. 40.Best estimate of 802 × 3? (a) 4800 (b) 2400 (c) 24000 (d) 240

Answer key

  1. 1521
  2. 183
  3. 180
  4. 128
  5. 208
  6. 224
  7. 4.1
  8. 5400
  9. 60
  10. 154
  11. 132
  12. 230
  13. 16
  14. 51
  15. 112
  16. 224
  17. 60
  18. 26.5
  19. 41.5
  20. wrong
  21. 2601
  22. 13
  23. 53
  24. 324
  25. 108
  26. 32
  27. 252
  28. 95
  29. 26
  30. 228
  31. 248
  32. 6561
  33. 307
  34. 32
  35. 1800
  36. 325
  37. 416
  38. 41.5
  39. wrong
  40. 2400

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths