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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 316 · 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. 1.91 × 50 =
  2. 2.₹71.35 − ₹22.65 =
  3. 3.1800 ÷ 50 =
  4. 4.62 × 15 =
  5. 5.3 + 2 + 8 + 7 =
  6. 6.255 + 39 =
  7. 7.157 × 4 =
  8. 8.51² =
  9. 9.₹11.10 + ₹12.25 =
  10. 10.1150 ÷ 50 =
  11. 11.9 + 2 + 6 + 1 + 2 =
  12. 12.213 + 89 =
  13. 13.12 × 14 =
  14. 14.34 × 15 =
  15. 15.10 × 15 =
  16. 16.Check with nines: 582 + 158 = 744. Correct or wrong? (a) correct (b) wrong
  17. 17.79 + 18 =
  18. 18.5% of 580 =
  19. 19.590 − 46 =
  20. 20.78 + 33 + 14 + 33 =
  21. 21.Check with nines: 337 + 787 = 1124. Correct or wrong? (a) wrong (b) correct
  22. 22.Check with nines: 16 × 71 = 1133. Correct or wrong? (a) correct (b) wrong
  23. 23.31 × 15 =
  24. 24.478 + 67 =
  25. 25.52 × 5 =
  26. 26.539 − 79 =
  27. 27.13 × 12 =
  28. 28.151 − 87 =
  29. 29.25% of 390 =
  30. 30.6 + 6 + 7 + 4 =
  31. 31.167 − 96 =
  32. 32.₹88.15 + ₹14.05 =
  33. 33.78 + 77 + 83 + 13 =
  34. 34.1850 ÷ 50 =
  35. 35.57 × 8 =
  36. 36.17 × 15 =
  37. 37.11 + 81 + 32 + 16 =
  38. 38.Check with nines: 246 + 473 = 719. Correct or wrong? (a) correct (b) wrong
  39. 39.7 × 15 =
  40. 40.9 + 7 + 2 + 7 + 3 =

Answer key

  1. 4550
  2. 48.7
  3. 36
  4. 930
  5. 20
  6. 294
  7. 628
  8. 2601
  9. 23.35
  10. 23
  11. 20
  12. 302
  13. 168
  14. 510
  15. 150
  16. wrong
  17. 97
  18. 29
  19. 544
  20. 158
  21. correct
  22. wrong
  23. 465
  24. 545
  25. 260
  26. 460
  27. 156
  28. 64
  29. 97.5
  30. 23
  31. 71
  32. 102.2
  33. 251
  34. 37
  35. 456
  36. 255
  37. 140
  38. correct
  39. 105
  40. 28

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