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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 400 · 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 × 17 =
  2. 2.7 + 7 + 2 + 3 + 1 =
  3. 3.497 + 68 =
  4. 4.Check with nines: 20 × 13 = 260. Correct or wrong? (a) correct (b) wrong
  5. 5.31 × 15 =
  6. 6.7 × 15 =
  7. 7.Best estimate of 702 × 8? (a) 560 (b) 11200 (c) 56000 (d) 5600
  8. 8.43 × 15 =
  9. 9.71² =
  10. 10.Best estimate of 69 × 88? (a) 63000 (b) 6300 (c) 12600 (d) 630
  11. 11.207 + 49 =
  12. 12.58 × 15 =
  13. 13.1% of 590 =
  14. 14.196 + 67 =
  15. 15.16 × 8 =
  16. 16.73 + 34 + 43 + 50 =
  17. 17.25 + 29 + 27 + 88 =
  18. 18.₹9.85 − ₹8.95 =
  19. 19.275 ÷ 25 =
  20. 20.10% of 90 =
  21. 21.40 × 15 =
  22. 22.₹6.30 + ₹40.30 =
  23. 23.₹58.15 + ₹27.85 =
  24. 24.39² =
  25. 25.Best estimate of 397 × 7? (a) 5600 (b) 280 (c) 2800 (d) 28000
  26. 26.155 × 4 =
  27. 27.550 ÷ 50 =
  28. 28.15 × 5 =
  29. 29.326 + 79 =
  30. 30.120 + 87 =
  31. 31.41² =
  32. 32.30 + 43 + 88 + 76 =
  33. 33.Best estimate of 402 × 7? (a) 280 (b) 5600 (c) 2800 (d) 28000
  34. 34.₹44.50 − ₹38.60 =
  35. 35.₹77.30 + ₹24.20 =
  36. 36.48 + 16 + 37 + 48 =
  37. 37.30 × 15 =
  38. 38.560 ÷ 5 =
  39. 39.4 + 7 + 3 + 8 + 2 =
  40. 40.₹17.15 + ₹23.05 =

Answer key

  1. 289
  2. 20
  3. 565
  4. correct
  5. 465
  6. 105
  7. 5600
  8. 645
  9. 5041
  10. 6300
  11. 256
  12. 870
  13. 5.9
  14. 263
  15. 128
  16. 200
  17. 169
  18. 0.9
  19. 11
  20. 9
  21. 600
  22. 46.6
  23. 86
  24. 1521
  25. 2800
  26. 620
  27. 11
  28. 75
  29. 405
  30. 207
  31. 1681
  32. 237
  33. 2800
  34. 5.9
  35. 101.5
  36. 149
  37. 450
  38. 112
  39. 24
  40. 40.2

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