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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 661 · 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. 1.35 × 15 =
  2. 2.₹27.40 + ₹23.30 =
  3. 3.4 + 7 + 6 + 4 =
  4. 4.248 − 88 =
  5. 5.Best estimate of 92 × 41? (a) 7200 (b) 36000 (c) 3600 (d) 360
  6. 6.790 ÷ 5 =
  7. 7.1300 ÷ 50 =
  8. 8.18 × 15 =
  9. 9.8 + 8 + 2 + 7 =
  10. 10.Best estimate of 701 × 9? (a) 6300 (b) 63000 (c) 630 (d) 12600
  11. 11.59 + 18 =
  12. 12.350 ÷ 25 =
  13. 13.81 × 5 =
  14. 14.55 × 50 =
  15. 15.1 + 2 + 8 + 1 + 9 =
  16. 16.7 × 15 =
  17. 17.7 × 15 =
  18. 18.125 × 4 =
  19. 19.Best estimate of 78 × 82? (a) 6400 (b) 640 (c) 64000 (d) 12800
  20. 20.409 − 17 =
  21. 21.590 − 56 =
  22. 22.17 × 16 =
  23. 23.494 + 97 =
  24. 24.52 × 5 =
  25. 25.402 + 97 =
  26. 26.20% of 770 =
  27. 27.81² =
  28. 28.400 ÷ 50 =
  29. 29.1000 ÷ 50 =
  30. 30.489 + 87 =
  31. 31.67 × 8 =
  32. 32.350 ÷ 50 =
  33. 33.₹45.90 − ₹20.85 =
  34. 34.39² =
  35. 35.41² =
  36. 36.61 × 8 =
  37. 37.343 + 28 =
  38. 38.Check with nines: 947 + 536 = 1485. Correct or wrong? (a) wrong (b) correct
  39. 39.39 + 29 =
  40. 40.60 + 24 + 60 + 36 =

Answer key

  1. 525
  2. 50.7
  3. 21
  4. 160
  5. 3600
  6. 158
  7. 26
  8. 270
  9. 25
  10. 6300
  11. 77
  12. 14
  13. 405
  14. 2750
  15. 21
  16. 105
  17. 105
  18. 500
  19. 6400
  20. 392
  21. 534
  22. 272
  23. 591
  24. 260
  25. 499
  26. 154
  27. 6561
  28. 8
  29. 20
  30. 576
  31. 536
  32. 7
  33. 25.05
  34. 1521
  35. 1681
  36. 488
  37. 371
  38. wrong
  39. 68
  40. 180

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