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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 106 · 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. 1.264 − 88 =
  2. 2.₹94.60 − ₹21.50 =
  3. 3.63 × 15 =
  4. 4.102 + 89 =
  5. 5.Best estimate of 31 × 51? (a) 15000 (b) 3000 (c) 150 (d) 1500
  6. 6.63 × 15 =
  7. 7.8 + 3 + 7 + 7 =
  8. 8.₹32.05 + ₹37.90 =
  9. 9.10% of 230 =
  10. 10.89 + 27 + 27 + 28 =
  11. 11.79² =
  12. 12.541 − 86 =
  13. 13.41² =
  14. 14.2 + 1 + 9 + 4 =
  15. 15.318 − 19 =
  16. 16.₹37.35 − ₹20.35 =
  17. 17.12 + 70 + 16 + 68 =
  18. 18.152 × 4 =
  19. 19.13 × 13 =
  20. 20.Check with nines: 772 + 772 = 1545. Correct or wrong? (a) wrong (b) correct
  21. 21.2 + 8 + 3 + 1 + 2 =
  22. 22.198 − 78 =
  23. 23.25 × 8 =
  24. 24.Check with nines: 786 + 179 = 965. Correct or wrong? (a) correct (b) wrong
  25. 25.37 + 12 + 25 + 17 =
  26. 26.Check with nines: 15 × 57 = 855. Correct or wrong? (a) wrong (b) correct
  27. 27.79² =
  28. 28.670 ÷ 5 =
  29. 29.23 × 4 =
  30. 30.89 × 50 =
  31. 31.401 + 67 =
  32. 32.1% of 390 =
  33. 33.29² =
  34. 34.455 − 99 =
  35. 35.50% of 160 =
  36. 36.5% of 440 =
  37. 37.16 × 5 =
  38. 38.15% of 480 =
  39. 39.81 × 4 =
  40. 40.14 × 19 =

Answer key

  1. 176
  2. 73.1
  3. 945
  4. 191
  5. 1500
  6. 945
  7. 25
  8. 69.95
  9. 23
  10. 171
  11. 6241
  12. 455
  13. 1681
  14. 16
  15. 299
  16. 17
  17. 166
  18. 608
  19. 169
  20. wrong
  21. 16
  22. 120
  23. 200
  24. correct
  25. 91
  26. correct
  27. 6241
  28. 134
  29. 92
  30. 4450
  31. 468
  32. 3.9
  33. 841
  34. 356
  35. 80
  36. 22
  37. 80
  38. 72
  39. 324
  40. 266

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