← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 947 · 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. 1.472 − 66 =
  2. 2.790 ÷ 5 =
  3. 3.10% of 820 =
  4. 4.8 + 2 + 5 + 2 =
  5. 5.Best estimate of 301 × 4? (a) 120 (b) 1200 (c) 12000 (d) 2400
  6. 6.₹18.40 + ₹49.30 =
  7. 7.Best estimate of 498 × 4? (a) 2000 (b) 20000 (c) 4000 (d) 200
  8. 8.91 − 18 =
  9. 9.53 × 15 =
  10. 10.5 × 15 =
  11. 11.6 + 8 + 2 + 8 =
  12. 12.21 + 12 + 77 + 31 =
  13. 13.253 + 78 =
  14. 14.2 + 8 + 8 + 7 =
  15. 15.Check with nines: 490 + 776 = 1266. Correct or wrong? (a) correct (b) wrong
  16. 16.65 × 5 =
  17. 17.₹85.30 − ₹37.15 =
  18. 18.209 − 99 =
  19. 19.20% of 140 =
  20. 20.37 × 5 =
  21. 21.₹48.35 + ₹34.40 =
  22. 22.12 × 14 =
  23. 23.1% of 80 =
  24. 24.24 × 15 =
  25. 25.Best estimate of 297 × 7? (a) 210 (b) 21000 (c) 2100 (d) 4200
  26. 26.472 + 59 =
  27. 27.159 + 57 =
  28. 28.351 − 99 =
  29. 29.77 + 84 + 36 + 53 =
  30. 30.₹25.10 − ₹24.75 =
  31. 31.59² =
  32. 32.20 × 4 =
  33. 33.29² =
  34. 34.42 × 4 =
  35. 35.5 + 5 + 6 + 2 + 3 =
  36. 36.₹52.75 − ₹6.35 =
  37. 37.91² =
  38. 38.61 × 8 =
  39. 39.Best estimate of 197 × 5? (a) 10000 (b) 100 (c) 2000 (d) 1000
  40. 40.4 + 5 + 2 + 6 + 2 =

Answer key

  1. 406
  2. 158
  3. 82
  4. 17
  5. 1200
  6. 67.7
  7. 2000
  8. 73
  9. 795
  10. 75
  11. 24
  12. 141
  13. 331
  14. 25
  15. correct
  16. 325
  17. 48.15
  18. 110
  19. 28
  20. 185
  21. 82.75
  22. 168
  23. 0.8
  24. 360
  25. 2100
  26. 531
  27. 216
  28. 252
  29. 250
  30. 0.35
  31. 3481
  32. 80
  33. 841
  34. 168
  35. 21
  36. 46.4
  37. 8281
  38. 488
  39. 1000
  40. 19

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