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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 785 · 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. 1.97 × 50 =
  2. 2.20% of 200 =
  3. 3.21 × 15 =
  4. 4.Best estimate of 58 × 21? (a) 1200 (b) 12000 (c) 120 (d) 2400
  5. 5.450 ÷ 50 =
  6. 6.100 ÷ 25 =
  7. 7.Check with nines: 539 + 159 = 698. Correct or wrong? (a) wrong (b) correct
  8. 8.9 + 5 + 1 + 6 =
  9. 9.₹92.75 + ₹9.35 =
  10. 10.34 + 47 =
  11. 11.8 × 15 =
  12. 12.109 × 4 =
  13. 13.Best estimate of 32 × 59? (a) 18000 (b) 180 (c) 1800 (d) 3600
  14. 14.18 × 16 =
  15. 15.18 × 19 =
  16. 16.12 × 15 =
  17. 17.432 − 68 =
  18. 18.91² =
  19. 19.5% of 470 =
  20. 20.22 × 15 =
  21. 21.2 + 2 + 8 + 4 =
  22. 22.₹76.85 + ₹4.50 =
  23. 23.25% of 60 =
  24. 24.Best estimate of 798 × 4? (a) 32000 (b) 320 (c) 3200 (d) 6400
  25. 25.397 + 97 =
  26. 26.₹51.65 + ₹38.25 =
  27. 27.5% of 720 =
  28. 28.79² =
  29. 29.15 × 4 =
  30. 30.31² =
  31. 31.89 × 50 =
  32. 32.71² =
  33. 33.8 + 3 + 7 + 4 =
  34. 34.Best estimate of 51 × 78? (a) 8000 (b) 40000 (c) 4000 (d) 400
  35. 35.₹34.75 − ₹22.45 =
  36. 36.324 + 69 =
  37. 37.85 + 39 =
  38. 38.Best estimate of 597 × 9? (a) 54000 (b) 10800 (c) 540 (d) 5400
  39. 39.307 − 18 =
  40. 40.91² =

Answer key

  1. 4850
  2. 40
  3. 315
  4. 1200
  5. 9
  6. 4
  7. correct
  8. 21
  9. 102.1
  10. 81
  11. 120
  12. 436
  13. 1800
  14. 288
  15. 342
  16. 180
  17. 364
  18. 8281
  19. 23.5
  20. 330
  21. 16
  22. 81.35
  23. 15
  24. 3200
  25. 494
  26. 89.9
  27. 36
  28. 6241
  29. 60
  30. 961
  31. 4450
  32. 5041
  33. 22
  34. 4000
  35. 12.3
  36. 393
  37. 124
  38. 5400
  39. 289
  40. 8281

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