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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 39 · 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. 1.17 × 13 =
  2. 2.Check with nines: 87 × 34 = 2958. Correct or wrong? (a) wrong (b) correct
  3. 3.7 + 9 + 9 + 9 + 1 =
  4. 4.89² =
  5. 5.Best estimate of 52 × 22? (a) 100 (b) 10000 (c) 2000 (d) 1000
  6. 6.502 − 87 =
  7. 7.13 × 16 =
  8. 8.69² =
  9. 9.54 × 5 =
  10. 10.362 + 97 =
  11. 11.90 × 5 =
  12. 12.375 ÷ 25 =
  13. 13.11 × 15 =
  14. 14.920 ÷ 5 =
  15. 15.5% of 790 =
  16. 16.13 × 19 =
  17. 17.10% of 750 =
  18. 18.535 − 99 =
  19. 19.1750 ÷ 50 =
  20. 20.79² =
  21. 21.89² =
  22. 22.57 × 8 =
  23. 23.21 + 13 + 55 + 67 =
  24. 24.366 + 27 =
  25. 25.101 + 19 =
  26. 26.492 + 39 =
  27. 27.19² =
  28. 28.81² =
  29. 29.47 × 5 =
  30. 30.5% of 860 =
  31. 31.43 × 5 =
  32. 32.90 × 5 =
  33. 33.41² =
  34. 34.Check with nines: 811 + 129 = 940. Correct or wrong? (a) wrong (b) correct
  35. 35.7 + 5 + 3 + 9 + 3 =
  36. 36.Best estimate of 801 × 8? (a) 64000 (b) 6400 (c) 12800 (d) 640
  37. 37.775 ÷ 25 =
  38. 38.16 × 19 =
  39. 39.Best estimate of 98 × 3? (a) 300 (b) 3000 (c) 600 (d) 30
  40. 40.81 + 17 =

Answer key

  1. 221
  2. correct
  3. 35
  4. 7921
  5. 1000
  6. 415
  7. 208
  8. 4761
  9. 270
  10. 459
  11. 450
  12. 15
  13. 165
  14. 184
  15. 39.5
  16. 247
  17. 75
  18. 436
  19. 35
  20. 6241
  21. 7921
  22. 456
  23. 156
  24. 393
  25. 120
  26. 531
  27. 361
  28. 6561
  29. 235
  30. 43
  31. 215
  32. 450
  33. 1681
  34. correct
  35. 27
  36. 6400
  37. 31
  38. 304
  39. 300
  40. 98

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