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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 15 · 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. 1.71² =
  2. 2.16 × 8 =
  3. 3.₹34.30 − ₹6.35 =
  4. 4.31 × 50 =
  5. 5.44 × 4 =
  6. 6.246 + 18 =
  7. 7.Check with nines: 14 × 15 = 205. Correct or wrong? (a) correct (b) wrong
  8. 8.69 − 19 =
  9. 9.1950 ÷ 50 =
  10. 10.148 × 4 =
  11. 11.Check with nines: 306 + 464 = 772. Correct or wrong? (a) wrong (b) correct
  12. 12.300 ÷ 50 =
  13. 13.53 + 13 + 74 + 31 =
  14. 14.38 + 47 + 19 + 64 =
  15. 15.22 × 5 =
  16. 16.₹78.20 − ₹3.30 =
  17. 17.₹90.65 + ₹28.75 =
  18. 18.66 + 79 + 20 + 60 =
  19. 19.79² =
  20. 20.15 × 4 =
  21. 21.81 × 5 =
  22. 22.325 ÷ 5 =
  23. 23.350 ÷ 50 =
  24. 24.19 × 50 =
  25. 25.Best estimate of 38 × 52? (a) 200 (b) 2000 (c) 4000 (d) 20000
  26. 26.81² =
  27. 27.56 × 50 =
  28. 28.11 + 23 + 61 + 75 =
  29. 29.₹43.15 − ₹18.65 =
  30. 30.₹41.75 + ₹17.25 =
  31. 31.35 × 15 =
  32. 32.21 + 55 + 30 + 82 =
  33. 33.264 + 27 =
  34. 34.474 + 27 =
  35. 35.16 × 18 =
  36. 36.19 × 50 =
  37. 37.Check with nines: 156 + 173 = 329. Correct or wrong? (a) wrong (b) correct
  38. 38.28 × 5 =
  39. 39.72 + 11 + 82 + 37 =
  40. 40.80 × 4 =

Answer key

  1. 5041
  2. 128
  3. 27.95
  4. 1550
  5. 176
  6. 264
  7. wrong
  8. 50
  9. 39
  10. 592
  11. wrong
  12. 6
  13. 171
  14. 168
  15. 110
  16. 74.9
  17. 119.4
  18. 225
  19. 6241
  20. 60
  21. 405
  22. 65
  23. 7
  24. 950
  25. 2000
  26. 6561
  27. 2800
  28. 170
  29. 24.5
  30. 59
  31. 525
  32. 188
  33. 291
  34. 501
  35. 288
  36. 950
  37. correct
  38. 140
  39. 202
  40. 320

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