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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 857 · 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 19 × 69? (a) 140 (b) 14000 (c) 1400 (d) 2800
  2. 2.69² =
  3. 3.41 + 18 + 79 + 39 =
  4. 4.480 + 77 =
  5. 5.32 × 8 =
  6. 6.29 × 5 =
  7. 7.80 × 5 =
  8. 8.113 + 27 =
  9. 9.43 × 15 =
  10. 10.418 − 39 =
  11. 11.19 × 15 =
  12. 12.375 ÷ 25 =
  13. 13.8 + 6 + 1 + 9 + 1 =
  14. 14.74 + 21 + 31 + 55 =
  15. 15.9 + 7 + 9 + 5 + 5 =
  16. 16.6 + 8 + 4 + 4 =
  17. 17.25% of 830 =
  18. 18.13 × 8 =
  19. 19.71² =
  20. 20.Best estimate of 103 × 6? (a) 6000 (b) 60 (c) 1200 (d) 600
  21. 21.₹59.65 + ₹30.35 =
  22. 22.7 + 6 + 7 + 1 + 9 =
  23. 23.1 + 1 + 1 + 6 + 9 =
  24. 24.Best estimate of 901 × 9? (a) 8100 (b) 810 (c) 16200 (d) 81000
  25. 25.15 × 15 =
  26. 26.61 × 15 =
  27. 27.17 × 15 =
  28. 28.12 × 11 =
  29. 29.1 + 2 + 4 + 9 + 3 =
  30. 30.80 × 5 =
  31. 31.17 × 5 =
  32. 32.55 × 15 =
  33. 33.41² =
  34. 34.139 + 48 =
  35. 35.39² =
  36. 36.₹18.10 + ₹45.15 =
  37. 37.59² =
  38. 38.44 + 77 + 22 + 36 =
  39. 39.Check with nines: 143 + 140 = 283. Correct or wrong? (a) correct (b) wrong
  40. 40.100 − 36 =

Answer key

  1. 1400
  2. 4761
  3. 177
  4. 557
  5. 256
  6. 145
  7. 400
  8. 140
  9. 645
  10. 379
  11. 285
  12. 15
  13. 25
  14. 181
  15. 35
  16. 22
  17. 207.5
  18. 104
  19. 5041
  20. 600
  21. 90
  22. 30
  23. 18
  24. 8100
  25. 225
  26. 915
  27. 255
  28. 132
  29. 19
  30. 400
  31. 85
  32. 825
  33. 1681
  34. 187
  35. 1521
  36. 63.25
  37. 3481
  38. 179
  39. correct
  40. 64

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