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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 344 · 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 38 × 52? (a) 200 (b) 20000 (c) 4000 (d) 2000
  2. 2.8 + 4 + 8 + 2 =
  3. 3.84 + 30 + 26 + 22 =
  4. 4.131 − 19 =
  5. 5.263 + 37 =
  6. 6.₹28.55 + ₹29.45 =
  7. 7.25% of 330 =
  8. 8.1% of 580 =
  9. 9.650 ÷ 50 =
  10. 10.41² =
  11. 11.15 × 18 =
  12. 12.470 + 88 =
  13. 13.30 × 4 =
  14. 14.425 + 27 =
  15. 15.79² =
  16. 16.1050 ÷ 50 =
  17. 17.9 + 1 + 2 + 4 + 1 =
  18. 18.81 × 50 =
  19. 19.3 + 2 + 2 + 9 + 1 =
  20. 20.19 × 15 =
  21. 21.393 − 58 =
  22. 22.74 × 4 =
  23. 23.₹53.15 − ₹23.20 =
  24. 24.105 × 4 =
  25. 25.Best estimate of 61 × 89? (a) 5400 (b) 10800 (c) 54000 (d) 540
  26. 26.22 × 5 =
  27. 27.439 − 78 =
  28. 28.4 + 9 + 1 + 1 =
  29. 29.192 + 17 =
  30. 30.377 − 68 =
  31. 31.552 − 76 =
  32. 32.19² =
  33. 33.7 + 3 + 9 + 7 + 3 =
  34. 34.446 + 69 =
  35. 35.104 + 47 =
  36. 36.231 − 68 =
  37. 37.1425 ÷ 25 =
  38. 38.242 − 68 =
  39. 39.Check with nines: 437 + 534 = 970. Correct or wrong? (a) wrong (b) correct
  40. 40.₹16.40 + ₹3.10 =

Answer key

  1. 2000
  2. 22
  3. 162
  4. 112
  5. 300
  6. 58
  7. 82.5
  8. 5.8
  9. 13
  10. 1681
  11. 270
  12. 558
  13. 120
  14. 452
  15. 6241
  16. 21
  17. 17
  18. 4050
  19. 17
  20. 285
  21. 335
  22. 296
  23. 29.95
  24. 420
  25. 5400
  26. 110
  27. 361
  28. 15
  29. 209
  30. 309
  31. 476
  32. 361
  33. 29
  34. 515
  35. 151
  36. 163
  37. 57
  38. 174
  39. wrong
  40. 19.5

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