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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 92 · 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.Check with nines: 764 + 638 = 1398. Correct or wrong? (a) wrong (b) correct
  2. 2.₹77.80 − ₹32.80 =
  3. 3.487 − 16 =
  4. 4.14 × 8 =
  5. 5.₹28.30 − ₹8.25 =
  6. 6.31 + 81 + 61 + 44 =
  7. 7.52 + 31 + 26 + 42 =
  8. 8.₹65.75 − ₹5.80 =
  9. 9.29² =
  10. 10.12 × 18 =
  11. 11.81 + 13 + 58 + 52 =
  12. 12.2 + 1 + 5 + 5 =
  13. 13.15 × 16 =
  14. 14.373 − 79 =
  15. 15.12 × 5 =
  16. 16.6 + 2 + 2 + 8 + 4 =
  17. 17.34 × 5 =
  18. 18.24 × 5 =
  19. 19.77 + 66 + 48 + 24 =
  20. 20.79² =
  21. 21.56 × 15 =
  22. 22.447 − 77 =
  23. 23.221 + 48 =
  24. 24.440 − 69 =
  25. 25.111 − 86 =
  26. 26.27 + 48 + 77 + 42 =
  27. 27.91² =
  28. 28.4 + 6 + 3 + 4 =
  29. 29.19² =
  30. 30.49 × 4 =
  31. 31.51² =
  32. 32.Best estimate of 52 × 32? (a) 1500 (b) 150 (c) 15000 (d) 3000
  33. 33.Best estimate of 799 × 5? (a) 40000 (b) 8000 (c) 4000 (d) 400
  34. 34.6 + 9 + 1 + 4 =
  35. 35.35 × 50 =
  36. 36.61 + 59 =
  37. 37.49² =
  38. 38.95 × 50 =
  39. 39.Best estimate of 48 × 89? (a) 9000 (b) 45000 (c) 450 (d) 4500
  40. 40.92 × 50 =

Answer key

  1. wrong
  2. 45
  3. 471
  4. 112
  5. 20.05
  6. 217
  7. 151
  8. 59.95
  9. 841
  10. 216
  11. 204
  12. 13
  13. 240
  14. 294
  15. 60
  16. 22
  17. 170
  18. 120
  19. 215
  20. 6241
  21. 840
  22. 370
  23. 269
  24. 371
  25. 25
  26. 194
  27. 8281
  28. 17
  29. 361
  30. 196
  31. 2601
  32. 1500
  33. 4000
  34. 20
  35. 1750
  36. 120
  37. 2401
  38. 4750
  39. 4500
  40. 4600

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