← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 680 · 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. 1.82 − 59 =
  2. 2.1050 ÷ 25 =
  3. 3.12 × 12 =
  4. 4.14 × 15 =
  5. 5.5% of 850 =
  6. 6.5 + 8 + 2 + 5 + 4 =
  7. 7.9 + 1 + 6 + 2 =
  8. 8.12 × 15 =
  9. 9.Check with nines: 826 + 511 = 1337. Correct or wrong? (a) correct (b) wrong
  10. 10.21² =
  11. 11.61 + 29 + 27 + 31 =
  12. 12.13 + 26 + 23 + 71 =
  13. 13.₹84.25 + ₹15.25 =
  14. 14.₹46.25 + ₹12.15 =
  15. 15.33 × 4 =
  16. 16.Check with nines: 75 × 59 = 4425. Correct or wrong? (a) correct (b) wrong
  17. 17.₹18.25 + ₹16.75 =
  18. 18.Best estimate of 402 × 4? (a) 1600 (b) 16000 (c) 3200 (d) 160
  19. 19.1 + 7 + 6 + 9 =
  20. 20.109 × 4 =
  21. 21.46 + 72 + 76 + 38 =
  22. 22.50% of 580 =
  23. 23.Best estimate of 899 × 6? (a) 540 (b) 54000 (c) 5400 (d) 10800
  24. 24.₹31.10 − ₹21.80 =
  25. 25.25% of 780 =
  26. 26.44 × 15 =
  27. 27.₹83.60 − ₹27.85 =
  28. 28.81² =
  29. 29.50% of 880 =
  30. 30.6 + 6 + 4 + 2 + 5 =
  31. 31.170 + 67 =
  32. 32.56 × 4 =
  33. 33.28 + 68 =
  34. 34.78 + 33 + 38 + 39 =
  35. 35.61 + 83 + 12 + 81 =
  36. 36.₹42.25 + ₹20.25 =
  37. 37.2 + 5 + 5 + 6 =
  38. 38.297 − 77 =
  39. 39.13 × 18 =
  40. 40.13 × 5 =

Answer key

  1. 23
  2. 42
  3. 144
  4. 210
  5. 42.5
  6. 24
  7. 18
  8. 180
  9. correct
  10. 441
  11. 148
  12. 133
  13. 99.5
  14. 58.4
  15. 132
  16. correct
  17. 35
  18. 1600
  19. 23
  20. 436
  21. 232
  22. 290
  23. 5400
  24. 9.3
  25. 195
  26. 660
  27. 55.75
  28. 6561
  29. 440
  30. 23
  31. 237
  32. 224
  33. 96
  34. 188
  35. 237
  36. 62.5
  37. 18
  38. 220
  39. 234
  40. 65

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