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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 905 · 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.Check with nines: 48 × 16 = 769. Correct or wrong? (a) correct (b) wrong
  2. 2.208 + 47 =
  3. 3.49² =
  4. 4.304 − 77 =
  5. 5.152 − 77 =
  6. 6.850 ÷ 25 =
  7. 7.6 × 15 =
  8. 8.16 × 8 =
  9. 9.1000 ÷ 25 =
  10. 10.114 − 79 =
  11. 11.Best estimate of 19 × 69? (a) 14000 (b) 1400 (c) 140 (d) 2800
  12. 12.₹84.45 + ₹28.05 =
  13. 13.464 + 88 =
  14. 14.₹49.70 − ₹6.25 =
  15. 15.1275 ÷ 25 =
  16. 16.301 + 17 =
  17. 17.16 × 50 =
  18. 18.140 − 46 =
  19. 19.₹47.65 + ₹11.45 =
  20. 20.89² =
  21. 21.48 × 15 =
  22. 22.Best estimate of 61 × 72? (a) 4200 (b) 42000 (c) 8400 (d) 420
  23. 23.19² =
  24. 24.37 × 8 =
  25. 25.49² =
  26. 26.Best estimate of 503 × 4? (a) 20000 (b) 2000 (c) 200 (d) 4000
  27. 27.29² =
  28. 28.158 × 4 =
  29. 29.4 + 9 + 7 + 6 =
  30. 30.93 + 19 =
  31. 31.6 + 1 + 4 + 9 =
  32. 32.34 × 4 =
  33. 33.21² =
  34. 34.19 × 15 =
  35. 35.25 + 15 + 26 + 19 =
  36. 36.53 + 39 =
  37. 37.46 × 15 =
  38. 38.355 − 19 =
  39. 39.367 + 97 =
  40. 40.42 + 22 + 45 + 65 =

Answer key

  1. wrong
  2. 255
  3. 2401
  4. 227
  5. 75
  6. 34
  7. 90
  8. 128
  9. 40
  10. 35
  11. 1400
  12. 112.5
  13. 552
  14. 43.45
  15. 51
  16. 318
  17. 800
  18. 94
  19. 59.1
  20. 7921
  21. 720
  22. 4200
  23. 361
  24. 296
  25. 2401
  26. 2000
  27. 841
  28. 632
  29. 26
  30. 112
  31. 20
  32. 136
  33. 441
  34. 285
  35. 85
  36. 92
  37. 690
  38. 336
  39. 464
  40. 174

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