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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 392 · 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. 1.24 × 15 =
  2. 2.₹84.55 + ₹17.85 =
  3. 3.19² =
  4. 4.₹50.50 − ₹5.80 =
  5. 5.₹14.10 + ₹34.25 =
  6. 6.Best estimate of 61 × 72? (a) 8400 (b) 42000 (c) 4200 (d) 420
  7. 7.338 − 89 =
  8. 8.16 × 15 =
  9. 9.119 − 49 =
  10. 10.615 ÷ 5 =
  11. 11.17 × 5 =
  12. 12.39 + 49 =
  13. 13.44 + 48 + 52 + 23 =
  14. 14.2 + 8 + 4 + 9 =
  15. 15.61² =
  16. 16.Check with nines: 29 × 19 = 543. Correct or wrong? (a) wrong (b) correct
  17. 17.72 + 76 + 80 + 23 =
  18. 18.1% of 490 =
  19. 19.107 × 4 =
  20. 20.61² =
  21. 21.Check with nines: 51 × 85 = 4335. Correct or wrong? (a) wrong (b) correct
  22. 22.₹91.45 − ₹28.40 =
  23. 23.49² =
  24. 24.₹50.90 + ₹3.15 =
  25. 25.10% of 140 =
  26. 26.10% of 570 =
  27. 27.25% of 260 =
  28. 28.14 × 13 =
  29. 29.61 × 8 =
  30. 30.Check with nines: 55 × 75 = 4126. Correct or wrong? (a) wrong (b) correct
  31. 31.Best estimate of 49 × 22? (a) 1000 (b) 10000 (c) 2000 (d) 100
  32. 32.106 − 19 =
  33. 33.66 × 8 =
  34. 34.11 × 16 =
  35. 35.31² =
  36. 36.52 + 18 =
  37. 37.46 × 15 =
  38. 38.6 + 1 + 9 + 1 + 9 =
  39. 39.5 + 3 + 5 + 7 + 6 =
  40. 40.17 × 15 =

Answer key

  1. 360
  2. 102.4
  3. 361
  4. 44.7
  5. 48.35
  6. 4200
  7. 249
  8. 240
  9. 70
  10. 123
  11. 85
  12. 88
  13. 167
  14. 23
  15. 3721
  16. wrong
  17. 251
  18. 4.9
  19. 428
  20. 3721
  21. correct
  22. 63.05
  23. 2401
  24. 54.05
  25. 14
  26. 57
  27. 65
  28. 182
  29. 488
  30. wrong
  31. 1000
  32. 87
  33. 528
  34. 176
  35. 961
  36. 70
  37. 690
  38. 26
  39. 26
  40. 255

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