← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 64 · 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 59 × 89? (a) 5400 (b) 54000 (c) 540 (d) 10800
  2. 2.47 + 42 + 60 + 28 =
  3. 3.Best estimate of 21 × 42? (a) 800 (b) 8000 (c) 1600 (d) 80
  4. 4.8 + 5 + 8 + 2 =
  5. 5.Check with nines: 694 + 728 = 1420. Correct or wrong? (a) correct (b) wrong
  6. 6.₹99.75 + ₹29.85 =
  7. 7.₹21.95 + ₹38.55 =
  8. 8.47 × 15 =
  9. 9.16 × 18 =
  10. 10.9 × 15 =
  11. 11.Best estimate of 52 × 79? (a) 40000 (b) 400 (c) 8000 (d) 4000
  12. 12.120 × 4 =
  13. 13.85 + 19 + 43 + 32 =
  14. 14.32 × 15 =
  15. 15.26 × 15 =
  16. 16.88 + 79 =
  17. 17.246 − 59 =
  18. 18.415 ÷ 5 =
  19. 19.246 + 87 =
  20. 20.177 − 89 =
  21. 21.22 × 15 =
  22. 22.₹90.35 − ₹30.80 =
  23. 23.14 + 57 + 20 + 42 =
  24. 24.49 + 25 + 41 + 33 =
  25. 25.10% of 500 =
  26. 26.89 × 4 =
  27. 27.₹23.70 + ₹14.25 =
  28. 28.55 × 15 =
  29. 29.41 × 15 =
  30. 30.1 + 6 + 4 + 2 =
  31. 31.₹70.05 − ₹36.95 =
  32. 32.91 × 5 =
  33. 33.14 × 8 =
  34. 34.295 − 99 =
  35. 35.18 + 79 + 84 + 28 =
  36. 36.72 × 50 =
  37. 37.58 × 5 =
  38. 38.36 × 15 =
  39. 39.Best estimate of 302 × 7? (a) 210 (b) 4200 (c) 21000 (d) 2100
  40. 40.93 × 5 =

Answer key

  1. 5400
  2. 177
  3. 800
  4. 23
  5. wrong
  6. 129.6
  7. 60.5
  8. 705
  9. 288
  10. 135
  11. 4000
  12. 480
  13. 179
  14. 480
  15. 390
  16. 167
  17. 187
  18. 83
  19. 333
  20. 88
  21. 330
  22. 59.55
  23. 133
  24. 148
  25. 50
  26. 356
  27. 37.95
  28. 825
  29. 615
  30. 13
  31. 33.1
  32. 455
  33. 112
  34. 196
  35. 209
  36. 3600
  37. 290
  38. 540
  39. 2100
  40. 465

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