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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 452 · 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. 1.18 × 14 =
  2. 2.59 × 8 =
  3. 3.181 − 36 =
  4. 4.Check with nines: 357 + 575 = 932. Correct or wrong? (a) correct (b) wrong
  5. 5.82 × 50 =
  6. 6.Best estimate of 499 × 4? (a) 200 (b) 4000 (c) 20000 (d) 2000
  7. 7.132 − 77 =
  8. 8.68 + 98 =
  9. 9.Best estimate of 18 × 52? (a) 10000 (b) 100 (c) 1000 (d) 2000
  10. 10.19² =
  11. 11.41² =
  12. 12.12 × 13 =
  13. 13.51 × 15 =
  14. 14.258 + 57 =
  15. 15.32 × 4 =
  16. 16.82 × 4 =
  17. 17.55 × 4 =
  18. 18.386 + 28 =
  19. 19.21² =
  20. 20.Best estimate of 28 × 82? (a) 4800 (b) 240 (c) 24000 (d) 2400
  21. 21.2 + 2 + 5 + 5 =
  22. 22.441 + 49 =
  23. 23.18 × 17 =
  24. 24.49 + 57 =
  25. 25.53 + 71 + 71 + 38 =
  26. 26.28 × 15 =
  27. 27.15 × 8 =
  28. 28.260 ÷ 5 =
  29. 29.50% of 40 =
  30. 30.79 + 68 + 83 + 45 =
  31. 31.Check with nines: 267 + 731 = 998. Correct or wrong? (a) correct (b) wrong
  32. 32.150 × 4 =
  33. 33.322 − 97 =
  34. 34.15% of 850 =
  35. 35.₹49.25 + ₹45.20 =
  36. 36.31 × 15 =
  37. 37.18 × 11 =
  38. 38.89 × 50 =
  39. 39.10% of 380 =
  40. 40.19 × 11 =

Answer key

  1. 252
  2. 472
  3. 145
  4. correct
  5. 4100
  6. 2000
  7. 55
  8. 166
  9. 1000
  10. 361
  11. 1681
  12. 156
  13. 765
  14. 315
  15. 128
  16. 328
  17. 220
  18. 414
  19. 441
  20. 2400
  21. 14
  22. 490
  23. 306
  24. 106
  25. 233
  26. 420
  27. 120
  28. 52
  29. 20
  30. 275
  31. correct
  32. 600
  33. 225
  34. 127.5
  35. 94.45
  36. 465
  37. 198
  38. 4450
  39. 38
  40. 209

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