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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 800 · 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. 1.17 × 15 =
  2. 2.₹75.15 + ₹41.70 =
  3. 3.50 + 16 + 19 + 83 =
  4. 4.₹39.15 + ₹11.80 =
  5. 5.352 − 58 =
  6. 6.53 × 8 =
  7. 7.₹39.05 − ₹36.05 =
  8. 8.142 × 4 =
  9. 9.Best estimate of 28 × 68? (a) 2100 (b) 210 (c) 4200 (d) 21000
  10. 10.20% of 150 =
  11. 11.₹38.50 − ₹36.60 =
  12. 12.42 × 50 =
  13. 13.5% of 670 =
  14. 14.81² =
  15. 15.9 + 3 + 1 + 1 =
  16. 16.17 × 17 =
  17. 17.102 + 77 =
  18. 18.520 ÷ 5 =
  19. 19.₹10.50 + ₹35.60 =
  20. 20.Best estimate of 41 × 88? (a) 3600 (b) 360 (c) 7200 (d) 36000
  21. 21.14 × 18 =
  22. 22.25% of 350 =
  23. 23.74 + 38 =
  24. 24.39² =
  25. 25.33 × 15 =
  26. 26.3 + 8 + 6 + 4 =
  27. 27.Best estimate of 38 × 41? (a) 3200 (b) 1600 (c) 16000 (d) 160
  28. 28.106 + 79 =
  29. 29.21² =
  30. 30.₹19.20 − ₹5.20 =
  31. 31.₹44.95 + ₹37.90 =
  32. 32.20 + 72 + 58 + 72 =
  33. 33.1% of 760 =
  34. 34.Best estimate of 103 × 4? (a) 800 (b) 40 (c) 400 (d) 4000
  35. 35.6 + 4 + 2 + 6 + 7 =
  36. 36.2 + 2 + 2 + 8 =
  37. 37.479 − 19 =
  38. 38.10% of 400 =
  39. 39.₹49.15 − ₹12.65 =
  40. 40.11 × 13 =

Answer key

  1. 255
  2. 116.85
  3. 168
  4. 50.95
  5. 294
  6. 424
  7. 3
  8. 568
  9. 2100
  10. 30
  11. 1.9
  12. 2100
  13. 33.5
  14. 6561
  15. 14
  16. 289
  17. 179
  18. 104
  19. 46.1
  20. 3600
  21. 252
  22. 87.5
  23. 112
  24. 1521
  25. 495
  26. 21
  27. 1600
  28. 185
  29. 441
  30. 14
  31. 82.85
  32. 222
  33. 7.6
  34. 400
  35. 25
  36. 14
  37. 460
  38. 40
  39. 36.5
  40. 143

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