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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 979 · 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.₹76.15 + ₹3.40 =
  2. 2.23 + 28 + 43 + 63 =
  3. 3.₹79.35 + ₹16.85 =
  4. 4.9 + 3 + 3 + 8 + 7 =
  5. 5.38 × 15 =
  6. 6.17 × 15 =
  7. 7.174 − 16 =
  8. 8.84 + 44 + 43 + 40 =
  9. 9.₹44.90 − ₹17.65 =
  10. 10.39 + 67 + 21 + 78 =
  11. 11.237 − 19 =
  12. 12.217 − 98 =
  13. 13.15 × 4 =
  14. 14.266 − 76 =
  15. 15.₹25.20 + ₹48.35 =
  16. 16.1% of 480 =
  17. 17.29² =
  18. 18.59² =
  19. 19.42 × 5 =
  20. 20.7 × 15 =
  21. 21.44 + 58 + 24 + 66 =
  22. 22.Best estimate of 19 × 41? (a) 8000 (b) 80 (c) 1600 (d) 800
  23. 23.5 + 2 + 6 + 8 =
  24. 24.113 + 79 =
  25. 25.67 + 14 + 66 + 31 =
  26. 26.9 + 2 + 9 + 1 =
  27. 27.73 × 4 =
  28. 28.₹96.05 − ₹14.15 =
  29. 29.46 × 15 =
  30. 30.17 × 14 =
  31. 31.29 × 15 =
  32. 32.113 − 38 =
  33. 33.4 + 6 + 6 + 6 =
  34. 34.Check with nines: 355 + 402 = 749. Correct or wrong? (a) wrong (b) correct
  35. 35.13 + 77 + 70 + 45 =
  36. 36.35 × 15 =
  37. 37.23 + 21 + 81 + 89 =
  38. 38.Check with nines: 249 + 596 = 843. Correct or wrong? (a) correct (b) wrong
  39. 39.830 ÷ 5 =
  40. 40.49² =

Answer key

  1. 79.55
  2. 157
  3. 96.2
  4. 30
  5. 570
  6. 255
  7. 158
  8. 211
  9. 27.25
  10. 205
  11. 218
  12. 119
  13. 60
  14. 190
  15. 73.55
  16. 4.8
  17. 841
  18. 3481
  19. 210
  20. 105
  21. 192
  22. 800
  23. 21
  24. 192
  25. 178
  26. 21
  27. 292
  28. 81.9
  29. 690
  30. 238
  31. 435
  32. 75
  33. 22
  34. wrong
  35. 205
  36. 525
  37. 214
  38. wrong
  39. 166
  40. 2401

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