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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 915 · 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. 1.93 × 50 =
  2. 2.81² =
  3. 3.25% of 90 =
  4. 4.202 − 66 =
  5. 5.27 × 15 =
  6. 6.63 × 8 =
  7. 7.Check with nines: 609 + 154 = 767. Correct or wrong? (a) correct (b) wrong
  8. 8.47 × 15 =
  9. 9.16 × 17 =
  10. 10.11 × 18 =
  11. 11.583 − 46 =
  12. 12.460 + 18 =
  13. 13.9 + 3 + 7 + 2 + 6 =
  14. 14.51 × 15 =
  15. 15.29² =
  16. 16.17 + 79 + 77 + 34 =
  17. 17.41 × 15 =
  18. 18.Best estimate of 79 × 18? (a) 3200 (b) 16000 (c) 160 (d) 1600
  19. 19.61 × 50 =
  20. 20.154 − 78 =
  21. 21.72 × 50 =
  22. 22.Check with nines: 157 + 671 = 828. Correct or wrong? (a) correct (b) wrong
  23. 23.9 + 8 + 2 + 7 + 2 =
  24. 24.₹31.25 − ₹9.15 =
  25. 25.25% of 330 =
  26. 26.16 × 14 =
  27. 27.₹49.65 + ₹31.30 =
  28. 28.91 × 50 =
  29. 29.Best estimate of 49 × 68? (a) 350 (b) 3500 (c) 7000 (d) 35000
  30. 30.25% of 650 =
  31. 31.2 + 9 + 7 + 1 + 7 =
  32. 32.71² =
  33. 33.₹18.55 − ₹13.50 =
  34. 34.58 × 15 =
  35. 35.29 × 5 =
  36. 36.3 + 7 + 1 + 9 =
  37. 37.₹20.85 + ₹39.90 =
  38. 38.4 + 6 + 3 + 7 =
  39. 39.540 − 57 =
  40. 40.73 × 50 =

Answer key

  1. 4650
  2. 6561
  3. 22.5
  4. 136
  5. 405
  6. 504
  7. wrong
  8. 705
  9. 272
  10. 198
  11. 537
  12. 478
  13. 27
  14. 765
  15. 841
  16. 207
  17. 615
  18. 1600
  19. 3050
  20. 76
  21. 3600
  22. correct
  23. 28
  24. 22.1
  25. 82.5
  26. 224
  27. 80.95
  28. 4550
  29. 3500
  30. 162.5
  31. 26
  32. 5041
  33. 5.05
  34. 870
  35. 145
  36. 20
  37. 60.75
  38. 20
  39. 483
  40. 3650

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