← Mixed speed challenge lesson New set →

Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 201 · 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. 1.193 − 18 =
  2. 2.89² =
  3. 3.8 × 15 =
  4. 4.41² =
  5. 5.₹66.70 + ₹39.10 =
  6. 6.Best estimate of 91 × 48? (a) 4500 (b) 450 (c) 45000 (d) 9000
  7. 7.468 − 56 =
  8. 8.41 × 50 =
  9. 9.34 × 15 =
  10. 10.42 + 85 + 30 + 85 =
  11. 11.4 + 5 + 2 + 8 =
  12. 12.475 ÷ 25 =
  13. 13.35 × 15 =
  14. 14.6 + 4 + 8 + 3 =
  15. 15.143 × 4 =
  16. 16.389 − 89 =
  17. 17.398 − 98 =
  18. 18.14 × 8 =
  19. 19.Check with nines: 81 × 39 = 3163. Correct or wrong? (a) correct (b) wrong
  20. 20.582 − 16 =
  21. 21.36 × 15 =
  22. 22.91² =
  23. 23.3 + 8 + 2 + 5 + 2 =
  24. 24.28 + 77 =
  25. 25.1425 ÷ 25 =
  26. 26.2 + 5 + 8 + 7 + 8 =
  27. 27.4 + 3 + 2 + 1 + 6 =
  28. 28.29² =
  29. 29.251 + 18 =
  30. 30.Best estimate of 28 × 89? (a) 27000 (b) 5400 (c) 270 (d) 2700
  31. 31.18 × 15 =
  32. 32.44 × 15 =
  33. 33.18 × 17 =
  34. 34.81² =
  35. 35.446 + 19 =
  36. 36.68 × 4 =
  37. 37.8 + 5 + 2 + 1 =
  38. 38.120 − 37 =
  39. 39.Best estimate of 72 × 59? (a) 420 (b) 8400 (c) 42000 (d) 4200
  40. 40.20 × 15 =

Answer key

  1. 175
  2. 7921
  3. 120
  4. 1681
  5. 105.8
  6. 4500
  7. 412
  8. 2050
  9. 510
  10. 242
  11. 19
  12. 19
  13. 525
  14. 21
  15. 572
  16. 300
  17. 300
  18. 112
  19. wrong
  20. 566
  21. 540
  22. 8281
  23. 20
  24. 105
  25. 57
  26. 30
  27. 16
  28. 841
  29. 269
  30. 2700
  31. 270
  32. 660
  33. 306
  34. 6561
  35. 465
  36. 272
  37. 16
  38. 83
  39. 4200
  40. 300

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