← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 171 · 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 101 × 4? (a) 400 (b) 4000 (c) 40 (d) 800
  2. 2.50% of 70 =
  3. 3.353 + 27 =
  4. 4.Check with nines: 20 × 38 = 762. Correct or wrong? (a) correct (b) wrong
  5. 5.494 + 77 =
  6. 6.396 − 98 =
  7. 7.Best estimate of 29 × 68? (a) 210 (b) 4200 (c) 2100 (d) 21000
  8. 8.Check with nines: 62 × 71 = 4402. Correct or wrong? (a) wrong (b) correct
  9. 9.15 × 19 =
  10. 10.573 − 58 =
  11. 11.375 − 26 =
  12. 12.21 × 4 =
  13. 13.17 × 5 =
  14. 14.₹48.90 + ₹44.05 =
  15. 15.37 + 29 + 46 + 64 =
  16. 16.₹31.65 + ₹25.75 =
  17. 17.164 + 39 =
  18. 18.70 × 5 =
  19. 19.25% of 200 =
  20. 20.₹51.50 + ₹15.75 =
  21. 21.81² =
  22. 22.49² =
  23. 23.146 − 56 =
  24. 24.140 × 4 =
  25. 25.464 + 77 =
  26. 26.91² =
  27. 27.432 + 77 =
  28. 28.₹35.70 − ₹14.05 =
  29. 29.55 + 63 + 23 + 37 =
  30. 30.350 ÷ 50 =
  31. 31.Check with nines: 77 × 26 = 2001. Correct or wrong? (a) wrong (b) correct
  32. 32.₹92.95 + ₹32.95 =
  33. 33.35 × 8 =
  34. 34.153 + 29 =
  35. 35.2 + 8 + 2 + 1 + 3 =
  36. 36.19 × 11 =
  37. 37.3 + 4 + 6 + 7 + 6 =
  38. 38.16 × 18 =
  39. 39.34 × 15 =
  40. 40.11 × 11 =

Answer key

  1. 400
  2. 35
  3. 380
  4. wrong
  5. 571
  6. 298
  7. 2100
  8. correct
  9. 285
  10. 515
  11. 349
  12. 84
  13. 85
  14. 92.95
  15. 176
  16. 57.4
  17. 203
  18. 350
  19. 50
  20. 67.25
  21. 6561
  22. 2401
  23. 90
  24. 560
  25. 541
  26. 8281
  27. 509
  28. 21.65
  29. 178
  30. 7
  31. wrong
  32. 125.9
  33. 280
  34. 182
  35. 16
  36. 209
  37. 26
  38. 288
  39. 510
  40. 121

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