← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 77 · 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. 1.1% of 90 =
  2. 2.9 + 6 + 5 + 1 + 6 =
  3. 3.Best estimate of 49 × 19? (a) 2000 (b) 100 (c) 10000 (d) 1000
  4. 4.7 + 2 + 3 + 2 =
  5. 5.20 × 8 =
  6. 6.39² =
  7. 7.239 + 88 =
  8. 8.84 × 50 =
  9. 9.191 + 38 =
  10. 10.1100 ÷ 25 =
  11. 11.497 − 36 =
  12. 12.10% of 570 =
  13. 13.Check with nines: 356 + 141 = 497. Correct or wrong? (a) wrong (b) correct
  14. 14.9 × 15 =
  15. 15.1075 ÷ 25 =
  16. 16.Best estimate of 81 × 81? (a) 640 (b) 64000 (c) 12800 (d) 6400
  17. 17.218 − 57 =
  18. 18.419 − 58 =
  19. 19.38 × 15 =
  20. 20.43 × 4 =
  21. 21.384 − 47 =
  22. 22.268 − 58 =
  23. 23.27 × 50 =
  24. 24.Check with nines: 21 × 18 = 374. Correct or wrong? (a) correct (b) wrong
  25. 25.29² =
  26. 26.277 − 29 =
  27. 27.43 × 5 =
  28. 28.Best estimate of 71 × 31? (a) 210 (b) 21000 (c) 2100 (d) 4200
  29. 29.6 + 1 + 3 + 4 =
  30. 30.73 + 78 + 66 + 47 =
  31. 31.66 × 5 =
  32. 32.4 + 9 + 6 + 1 =
  33. 33.4 + 4 + 3 + 1 + 6 =
  34. 34.17 × 15 =
  35. 35.66 × 4 =
  36. 36.89 × 50 =
  37. 37.31 + 35 + 25 + 55 =
  38. 38.17 × 18 =
  39. 39.72 + 31 + 17 + 80 =
  40. 40.935 ÷ 5 =

Answer key

  1. 0.9
  2. 27
  3. 1000
  4. 14
  5. 160
  6. 1521
  7. 327
  8. 4200
  9. 229
  10. 44
  11. 461
  12. 57
  13. correct
  14. 135
  15. 43
  16. 6400
  17. 161
  18. 361
  19. 570
  20. 172
  21. 337
  22. 210
  23. 1350
  24. wrong
  25. 841
  26. 248
  27. 215
  28. 2100
  29. 14
  30. 264
  31. 330
  32. 20
  33. 18
  34. 255
  35. 264
  36. 4450
  37. 146
  38. 306
  39. 200
  40. 187

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