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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 313 · 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. 1.39² =
  2. 2.12 × 15 =
  3. 3.Check with nines: 348 + 957 = 1305. Correct or wrong? (a) wrong (b) correct
  4. 4.52 × 4 =
  5. 5.74 × 50 =
  6. 6.₹45.10 − ₹6.60 =
  7. 7.79² =
  8. 8.54 × 50 =
  9. 9.79² =
  10. 10.382 − 66 =
  11. 11.59² =
  12. 12.51 × 8 =
  13. 13.975 ÷ 25 =
  14. 14.17 × 50 =
  15. 15.80 × 50 =
  16. 16.7 + 5 + 5 + 3 =
  17. 17.Best estimate of 902 × 5? (a) 450 (b) 45000 (c) 4500 (d) 9000
  18. 18.84 × 50 =
  19. 19.Best estimate of 59 × 28? (a) 18000 (b) 1800 (c) 180 (d) 3600
  20. 20.71² =
  21. 21.₹94.20 − ₹40.25 =
  22. 22.8 + 5 + 4 + 2 + 5 =
  23. 23.47 × 5 =
  24. 24.25 × 8 =
  25. 25.22 + 61 + 44 + 59 =
  26. 26.Best estimate of 62 × 51? (a) 300 (b) 6000 (c) 3000 (d) 30000
  27. 27.147 + 99 =
  28. 28.250 ÷ 50 =
  29. 29.69 + 79 + 69 + 28 =
  30. 30.₹70.80 − ₹4.85 =
  31. 31.₹48.15 + ₹33.25 =
  32. 32.17 × 14 =
  33. 33.5 + 9 + 5 + 7 + 3 =
  34. 34.441 + 88 =
  35. 35.₹91.40 − ₹48.95 =
  36. 36.391 − 89 =
  37. 37.11 × 11 =
  38. 38.462 + 38 =
  39. 39.62 + 19 =
  40. 40.485 + 58 =

Answer key

  1. 1521
  2. 180
  3. correct
  4. 208
  5. 3700
  6. 38.5
  7. 6241
  8. 2700
  9. 6241
  10. 316
  11. 3481
  12. 408
  13. 39
  14. 850
  15. 4000
  16. 20
  17. 4500
  18. 4200
  19. 1800
  20. 5041
  21. 53.95
  22. 24
  23. 235
  24. 200
  25. 186
  26. 3000
  27. 246
  28. 5
  29. 245
  30. 65.95
  31. 81.4
  32. 238
  33. 29
  34. 529
  35. 42.45
  36. 302
  37. 121
  38. 500
  39. 81
  40. 543

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