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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 862 · 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 71 × 19? (a) 2800 (b) 14000 (c) 1400 (d) 140
  2. 2.650 ÷ 50 =
  3. 3.26 × 5 =
  4. 4.18 × 13 =
  5. 5.67 + 31 + 56 + 37 =
  6. 6.11 × 14 =
  7. 7.₹85.60 + ₹23.30 =
  8. 8.40 × 15 =
  9. 9.14 × 50 =
  10. 10.9 + 1 + 7 + 9 + 1 =
  11. 11.456 − 59 =
  12. 12.117 + 89 =
  13. 13.161 − 77 =
  14. 14.₹47.60 + ₹20.30 =
  15. 15.1400 ÷ 50 =
  16. 16.₹59.40 + ₹47.40 =
  17. 17.39 + 32 + 28 + 72 =
  18. 18.132 − 26 =
  19. 19.13 × 17 =
  20. 20.Check with nines: 17 × 48 = 812. Correct or wrong? (a) wrong (b) correct
  21. 21.8 + 5 + 5 + 6 + 3 =
  22. 22.202 + 29 =
  23. 23.5 + 6 + 4 + 7 =
  24. 24.56 × 4 =
  25. 25.Check with nines: 83 × 44 = 3652. Correct or wrong? (a) correct (b) wrong
  26. 26.13 × 11 =
  27. 27.67 × 50 =
  28. 28.₹60.70 + ₹39.85 =
  29. 29.370 − 49 =
  30. 30.38 × 15 =
  31. 31.5 × 15 =
  32. 32.450 ÷ 50 =
  33. 33.32 + 70 + 53 + 12 =
  34. 34.52 + 19 + 76 + 11 =
  35. 35.97 × 50 =
  36. 36.18 + 30 + 74 + 16 =
  37. 37.576 − 99 =
  38. 38.380 ÷ 5 =
  39. 39.725 ÷ 25 =
  40. 40.32 + 82 + 85 + 62 =

Answer key

  1. 1400
  2. 13
  3. 130
  4. 234
  5. 191
  6. 154
  7. 108.9
  8. 600
  9. 700
  10. 27
  11. 397
  12. 206
  13. 84
  14. 67.9
  15. 28
  16. 106.8
  17. 171
  18. 106
  19. 221
  20. wrong
  21. 27
  22. 231
  23. 22
  24. 224
  25. correct
  26. 143
  27. 3350
  28. 100.55
  29. 321
  30. 570
  31. 75
  32. 9
  33. 167
  34. 158
  35. 4850
  36. 138
  37. 477
  38. 76
  39. 29
  40. 261

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