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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 848 · 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.Best estimate of 71 × 88? (a) 6300 (b) 12600 (c) 630 (d) 63000
  2. 2.24 × 15 =
  3. 3.875 ÷ 5 =
  4. 4.14 + 46 + 44 + 50 =
  5. 5.13 × 14 =
  6. 6.Best estimate of 72 × 19? (a) 2800 (b) 14000 (c) 1400 (d) 140
  7. 7.3 + 3 + 6 + 7 + 7 =
  8. 8.105 × 4 =
  9. 9.16 × 5 =
  10. 10.810 ÷ 5 =
  11. 11.84 − 79 =
  12. 12.7 + 5 + 2 + 3 + 6 =
  13. 13.575 − 76 =
  14. 14.42 × 8 =
  15. 15.3 + 6 + 7 + 7 =
  16. 16.14 × 15 =
  17. 17.61 + 57 + 86 + 36 =
  18. 18.1 + 9 + 6 + 9 + 9 =
  19. 19.184 + 18 =
  20. 20.200 − 38 =
  21. 21.15 × 15 =
  22. 22.58 × 15 =
  23. 23.12 × 16 =
  24. 24.61² =
  25. 25.19 × 14 =
  26. 26.31² =
  27. 27.71 + 13 + 62 + 70 =
  28. 28.11 × 11 =
  29. 29.524 − 68 =
  30. 30.582 − 26 =
  31. 31.Best estimate of 498 × 9? (a) 9000 (b) 450 (c) 4500 (d) 45000
  32. 32.3 + 6 + 4 + 6 + 2 =
  33. 33.383 − 26 =
  34. 34.Check with nines: 205 + 166 = 366. Correct or wrong? (a) correct (b) wrong
  35. 35.1% of 740 =
  36. 36.417 − 97 =
  37. 37.8 + 7 + 3 + 7 =
  38. 38.1050 ÷ 25 =
  39. 39.41 + 69 =
  40. 40.94 × 4 =

Answer key

  1. 6300
  2. 360
  3. 175
  4. 154
  5. 182
  6. 1400
  7. 26
  8. 420
  9. 80
  10. 162
  11. 5
  12. 23
  13. 499
  14. 336
  15. 23
  16. 210
  17. 240
  18. 34
  19. 202
  20. 162
  21. 225
  22. 870
  23. 192
  24. 3721
  25. 266
  26. 961
  27. 216
  28. 121
  29. 456
  30. 556
  31. 4500
  32. 21
  33. 357
  34. wrong
  35. 7.4
  36. 320
  37. 25
  38. 42
  39. 110
  40. 376

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