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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 34 · 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.₹66.40 − ₹22.15 =
  2. 2.6 + 7 + 6 + 3 =
  3. 3.3 + 6 + 2 + 8 =
  4. 4.Best estimate of 32 × 78? (a) 4800 (b) 2400 (c) 240 (d) 24000
  5. 5.303 + 89 =
  6. 6.2 + 4 + 2 + 8 + 8 =
  7. 7.10% of 400 =
  8. 8.23 × 50 =
  9. 9.55 × 4 =
  10. 10.62 − 56 =
  11. 11.269 − 97 =
  12. 12.7 + 1 + 3 + 6 + 9 =
  13. 13.78 − 38 =
  14. 14.37 × 15 =
  15. 15.73 + 85 + 43 + 71 =
  16. 16.Check with nines: 807 + 723 = 1528. Correct or wrong? (a) correct (b) wrong
  17. 17.₹85.15 + ₹35.90 =
  18. 18.16 × 11 =
  19. 19.11 × 15 =
  20. 20.491 + 28 =
  21. 21.416 − 49 =
  22. 22.₹92.05 + ₹10.20 =
  23. 23.81² =
  24. 24.71 × 50 =
  25. 25.49 × 15 =
  26. 26.79² =
  27. 27.36 × 50 =
  28. 28.69 + 97 =
  29. 29.64 × 8 =
  30. 30.Best estimate of 19 × 72? (a) 1400 (b) 2800 (c) 14000 (d) 140
  31. 31.89 + 25 + 84 + 69 =
  32. 32.51² =
  33. 33.12 × 12 =
  34. 34.205 ÷ 5 =
  35. 35.125 − 27 =
  36. 36.80 + 12 + 46 + 61 =
  37. 37.Best estimate of 71 × 42? (a) 28000 (b) 5600 (c) 280 (d) 2800
  38. 38.591 − 28 =
  39. 39.27 × 5 =
  40. 40.₹55.20 + ₹48.85 =

Answer key

  1. 44.25
  2. 22
  3. 19
  4. 2400
  5. 392
  6. 24
  7. 40
  8. 1150
  9. 220
  10. 6
  11. 172
  12. 26
  13. 40
  14. 555
  15. 272
  16. wrong
  17. 121.05
  18. 176
  19. 165
  20. 519
  21. 367
  22. 102.25
  23. 6561
  24. 3550
  25. 735
  26. 6241
  27. 1800
  28. 166
  29. 512
  30. 1400
  31. 267
  32. 2601
  33. 144
  34. 41
  35. 98
  36. 199
  37. 2800
  38. 563
  39. 135
  40. 104.05

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