← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 158 · 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. 1.59 × 15 =
  2. 2.₹75.15 − ₹9.10 =
  3. 3.Check with nines: 531 + 885 = 1416. Correct or wrong? (a) wrong (b) correct
  4. 4.12 × 16 =
  5. 5.4 + 4 + 1 + 2 + 6 =
  6. 6.39 × 50 =
  7. 7.477 − 48 =
  8. 8.79² =
  9. 9.93 × 4 =
  10. 10.430 ÷ 5 =
  11. 11.515 − 89 =
  12. 12.₹87.60 + ₹26.05 =
  13. 13.1025 ÷ 25 =
  14. 14.71 × 8 =
  15. 15.Check with nines: 16 × 83 = 1326. Correct or wrong? (a) correct (b) wrong
  16. 16.Best estimate of 199 × 8? (a) 16000 (b) 160 (c) 1600 (d) 3200
  17. 17.Best estimate of 698 × 6? (a) 420 (b) 8400 (c) 4200 (d) 42000
  18. 18.₹19.70 + ₹46.50 =
  19. 19.9 × 15 =
  20. 20.1500 ÷ 50 =
  21. 21.39² =
  22. 22.Best estimate of 92 × 48? (a) 4500 (b) 450 (c) 9000 (d) 45000
  23. 23.85 × 5 =
  24. 24.21² =
  25. 25.63 × 5 =
  26. 26.458 − 58 =
  27. 27.₹20.75 + ₹33.60 =
  28. 28.13 × 15 =
  29. 29.525 ÷ 5 =
  30. 30.400 ÷ 25 =
  31. 31.₹67.10 − ₹8.30 =
  32. 32.259 + 97 =
  33. 33.35 + 68 =
  34. 34.9 + 5 + 5 + 4 + 5 =
  35. 35.15 × 18 =
  36. 36.2 + 8 + 4 + 5 + 5 =
  37. 37.50% of 780 =
  38. 38.9 + 1 + 9 + 3 + 2 =
  39. 39.₹29.30 + ₹7.45 =
  40. 40.19 × 19 =

Answer key

  1. 885
  2. 66.05
  3. correct
  4. 192
  5. 17
  6. 1950
  7. 429
  8. 6241
  9. 372
  10. 86
  11. 426
  12. 113.65
  13. 41
  14. 568
  15. wrong
  16. 1600
  17. 4200
  18. 66.2
  19. 135
  20. 30
  21. 1521
  22. 4500
  23. 425
  24. 441
  25. 315
  26. 400
  27. 54.35
  28. 195
  29. 105
  30. 16
  31. 58.8
  32. 356
  33. 103
  34. 28
  35. 270
  36. 24
  37. 390
  38. 24
  39. 36.75
  40. 361

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