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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 384 · 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. 1.378 − 66 =
  2. 2.750 ÷ 25 =
  3. 3.1150 ÷ 25 =
  4. 4.89² =
  5. 5.17 × 16 =
  6. 6.23 × 4 =
  7. 7.11 × 11 =
  8. 8.375 ÷ 25 =
  9. 9.₹66.10 − ₹30.70 =
  10. 10.Check with nines: 26 × 59 = 1527. Correct or wrong? (a) wrong (b) correct
  11. 11.1550 ÷ 50 =
  12. 12.38 + 68 + 63 + 29 =
  13. 13.56 + 38 =
  14. 14.17 × 15 =
  15. 15.9 + 8 + 7 + 2 + 1 =
  16. 16.325 ÷ 25 =
  17. 17.87 + 60 + 37 + 68 =
  18. 18.52 × 5 =
  19. 19.₹98.80 − ₹24.45 =
  20. 20.18 × 12 =
  21. 21.₹18.85 + ₹22.05 =
  22. 22.52 × 5 =
  23. 23.74 × 4 =
  24. 24.59² =
  25. 25.49² =
  26. 26.6 + 4 + 2 + 8 =
  27. 27.Check with nines: 511 + 566 = 1077. Correct or wrong? (a) wrong (b) correct
  28. 28.₹40.50 − ₹10.20 =
  29. 29.506 − 18 =
  30. 30.432 − 19 =
  31. 31.342 − 48 =
  32. 32.185 + 89 =
  33. 33.381 + 78 =
  34. 34.₹91.70 − ₹2.95 =
  35. 35.Check with nines: 20 × 81 = 1622. Correct or wrong? (a) correct (b) wrong
  36. 36.393 − 78 =
  37. 37.8 + 5 + 4 + 2 + 5 =
  38. 38.Best estimate of 49 × 39? (a) 4000 (b) 20000 (c) 2000 (d) 200
  39. 39.₹24.45 − ₹21.10 =
  40. 40.395 ÷ 5 =

Answer key

  1. 312
  2. 30
  3. 46
  4. 7921
  5. 272
  6. 92
  7. 121
  8. 15
  9. 35.4
  10. wrong
  11. 31
  12. 198
  13. 94
  14. 255
  15. 27
  16. 13
  17. 252
  18. 260
  19. 74.35
  20. 216
  21. 40.9
  22. 260
  23. 296
  24. 3481
  25. 2401
  26. 20
  27. correct
  28. 30.3
  29. 488
  30. 413
  31. 294
  32. 274
  33. 459
  34. 88.75
  35. wrong
  36. 315
  37. 24
  38. 2000
  39. 3.35
  40. 79

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