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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 43 · 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. 1.417 − 68 =
  2. 2.25% of 270 =
  3. 3.9 + 8 + 2 + 1 =
  4. 4.1% of 800 =
  5. 5.16 × 16 =
  6. 6.5 + 2 + 8 + 9 =
  7. 7.103 + 98 =
  8. 8.5 + 1 + 6 + 9 =
  9. 9.Check with nines: 359 + 741 = 1100. Correct or wrong? (a) wrong (b) correct
  10. 10.81² =
  11. 11.17 × 15 =
  12. 12.525 ÷ 25 =
  13. 13.38 + 25 + 56 + 76 =
  14. 14.Best estimate of 92 × 49? (a) 45000 (b) 9000 (c) 4500 (d) 450
  15. 15.19² =
  16. 16.1850 ÷ 50 =
  17. 17.85 ÷ 5 =
  18. 18.5% of 120 =
  19. 19.45 × 4 =
  20. 20.135 ÷ 5 =
  21. 21.₹24.35 − ₹8.70 =
  22. 22.17 + 89 + 72 + 67 =
  23. 23.61² =
  24. 24.Check with nines: 70 × 40 = 2800. Correct or wrong? (a) wrong (b) correct
  25. 25.390 + 17 =
  26. 26.16 × 15 =
  27. 27.32 × 5 =
  28. 28.Check with nines: 34 × 53 = 1807. Correct or wrong? (a) correct (b) wrong
  29. 29.5% of 550 =
  30. 30.15% of 480 =
  31. 31.6 + 5 + 4 + 4 =
  32. 32.201 − 17 =
  33. 33.43 + 58 =
  34. 34.73 × 5 =
  35. 35.Best estimate of 697 × 6? (a) 8400 (b) 420 (c) 42000 (d) 4200
  36. 36.₹20.65 + ₹7.50 =
  37. 37.394 + 29 =
  38. 38.221 − 57 =
  39. 39.16 × 14 =
  40. 40.29² =

Answer key

  1. 349
  2. 67.5
  3. 20
  4. 8
  5. 256
  6. 24
  7. 201
  8. 21
  9. correct
  10. 6561
  11. 255
  12. 21
  13. 195
  14. 4500
  15. 361
  16. 37
  17. 17
  18. 6
  19. 180
  20. 27
  21. 15.65
  22. 245
  23. 3721
  24. correct
  25. 407
  26. 240
  27. 160
  28. wrong
  29. 27.5
  30. 72
  31. 19
  32. 184
  33. 101
  34. 365
  35. 4200
  36. 28.15
  37. 423
  38. 164
  39. 224
  40. 841

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