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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 108 · 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. 1.35 × 8 =
  2. 2.12 × 5 =
  3. 3.55 × 15 =
  4. 4.80 + 25 + 16 + 69 =
  5. 5.28 × 5 =
  6. 6.11 × 17 =
  7. 7.5 + 1 + 4 + 5 =
  8. 8.145 + 27 =
  9. 9.134 × 4 =
  10. 10.391 + 28 =
  11. 11.20% of 30 =
  12. 12.40 × 15 =
  13. 13.6 + 6 + 2 + 9 + 8 =
  14. 14.31² =
  15. 15.Check with nines: 79 × 30 = 2376. Correct or wrong? (a) wrong (b) correct
  16. 16.Best estimate of 18 × 19? (a) 800 (b) 40 (c) 400 (d) 4000
  17. 17.592 − 88 =
  18. 18.₹44.40 + ₹40.25 =
  19. 19.76 × 50 =
  20. 20.101 × 4 =
  21. 21.39² =
  22. 22.39 × 5 =
  23. 23.865 ÷ 5 =
  24. 24.18 × 4 =
  25. 25.17 × 11 =
  26. 26.30 + 55 + 73 + 18 =
  27. 27.20% of 140 =
  28. 28.Best estimate of 48 × 48? (a) 5000 (b) 250 (c) 2500 (d) 25000
  29. 29.61 × 50 =
  30. 30.15 + 24 + 47 + 21 =
  31. 31.28 × 5 =
  32. 32.16 × 18 =
  33. 33.77 × 4 =
  34. 34.8 + 2 + 8 + 9 =
  35. 35.175 ÷ 25 =
  36. 36.Check with nines: 39 × 28 = 1092. Correct or wrong? (a) wrong (b) correct
  37. 37.₹47.70 − ₹41.90 =
  38. 38.27 × 50 =
  39. 39.Best estimate of 18 × 31? (a) 600 (b) 60 (c) 6000 (d) 1200
  40. 40.30 × 15 =

Answer key

  1. 280
  2. 60
  3. 825
  4. 190
  5. 140
  6. 187
  7. 15
  8. 172
  9. 536
  10. 419
  11. 6
  12. 600
  13. 31
  14. 961
  15. wrong
  16. 400
  17. 504
  18. 84.65
  19. 3800
  20. 404
  21. 1521
  22. 195
  23. 173
  24. 72
  25. 187
  26. 176
  27. 28
  28. 2500
  29. 3050
  30. 107
  31. 140
  32. 288
  33. 308
  34. 27
  35. 7
  36. correct
  37. 5.8
  38. 1350
  39. 600
  40. 450

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