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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 643 · 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. 1.13 × 17 =
  2. 2.25% of 210 =
  3. 3.96 − 18 =
  4. 4.Check with nines: 23 × 83 = 1909. Correct or wrong? (a) wrong (b) correct
  5. 5.41 + 50 + 55 + 22 =
  6. 6.192 + 58 =
  7. 7.55 − 18 =
  8. 8.149 + 19 =
  9. 9.5 + 7 + 8 + 5 =
  10. 10.Check with nines: 33 × 18 = 594. Correct or wrong? (a) wrong (b) correct
  11. 11.50 × 8 =
  12. 12.32 × 8 =
  13. 13.9 + 9 + 1 + 7 =
  14. 14.41² =
  15. 15.49² =
  16. 16.₹37.95 + ₹37.70 =
  17. 17.₹9.85 − ₹4.75 =
  18. 18.₹69.20 − ₹39.10 =
  19. 19.29² =
  20. 20.87 × 4 =
  21. 21.19² =
  22. 22.30 + 28 + 32 + 84 =
  23. 23.39² =
  24. 24.20 × 15 =
  25. 25.89² =
  26. 26.1% of 410 =
  27. 27.71² =
  28. 28.5% of 210 =
  29. 29.41 × 15 =
  30. 30.598 − 88 =
  31. 31.16 × 12 =
  32. 32.31 × 4 =
  33. 33.290 + 87 =
  34. 34.50% of 570 =
  35. 35.Check with nines: 450 + 290 = 743. Correct or wrong? (a) wrong (b) correct
  36. 36.950 ÷ 5 =
  37. 37.Best estimate of 81 × 89? (a) 72000 (b) 14400 (c) 720 (d) 7200
  38. 38.277 + 29 =
  39. 39.31 × 15 =
  40. 40.250 + 17 =

Answer key

  1. 221
  2. 52.5
  3. 78
  4. correct
  5. 168
  6. 250
  7. 37
  8. 168
  9. 25
  10. correct
  11. 400
  12. 256
  13. 26
  14. 1681
  15. 2401
  16. 75.65
  17. 5.1
  18. 30.1
  19. 841
  20. 348
  21. 361
  22. 174
  23. 1521
  24. 300
  25. 7921
  26. 4.1
  27. 5041
  28. 10.5
  29. 615
  30. 510
  31. 192
  32. 124
  33. 377
  34. 285
  35. wrong
  36. 190
  37. 7200
  38. 306
  39. 465
  40. 267

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