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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 910 · 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. 1.60 × 15 =
  2. 2.121 − 57 =
  3. 3.24 × 8 =
  4. 4.Best estimate of 79 × 49? (a) 8000 (b) 4000 (c) 400 (d) 40000
  5. 5.10% of 340 =
  6. 6.Best estimate of 41 × 59? (a) 4800 (b) 2400 (c) 240 (d) 24000
  7. 7.2 + 4 + 6 + 6 =
  8. 8.29 + 36 + 20 + 79 =
  9. 9.14 × 12 =
  10. 10.89² =
  11. 11.Check with nines: 82 × 52 = 4264. Correct or wrong? (a) wrong (b) correct
  12. 12.58 × 15 =
  13. 13.50 × 8 =
  14. 14.180 + 59 =
  15. 15.22 × 15 =
  16. 16.80 × 50 =
  17. 17.41² =
  18. 18.1% of 610 =
  19. 19.15% of 710 =
  20. 20.13 × 15 =
  21. 21.5 + 5 + 3 + 5 + 2 =
  22. 22.19² =
  23. 23.79² =
  24. 24.20% of 360 =
  25. 25.86 × 5 =
  26. 26.82 + 65 + 55 + 48 =
  27. 27.25 + 28 =
  28. 28.1 + 4 + 6 + 9 =
  29. 29.5 + 5 + 9 + 7 + 5 =
  30. 30.59² =
  31. 31.103 × 4 =
  32. 32.₹86.25 − ₹41.60 =
  33. 33.Check with nines: 940 + 705 = 1645. Correct or wrong? (a) correct (b) wrong
  34. 34.348 − 69 =
  35. 35.12 × 19 =
  36. 36.Check with nines: 51 × 97 = 4943. Correct or wrong? (a) correct (b) wrong
  37. 37.70 × 5 =
  38. 38.182 − 19 =
  39. 39.15 × 14 =
  40. 40.13 × 15 =

Answer key

  1. 900
  2. 64
  3. 192
  4. 4000
  5. 34
  6. 2400
  7. 18
  8. 164
  9. 168
  10. 7921
  11. correct
  12. 870
  13. 400
  14. 239
  15. 330
  16. 4000
  17. 1681
  18. 6.1
  19. 106.5
  20. 195
  21. 20
  22. 361
  23. 6241
  24. 72
  25. 430
  26. 250
  27. 53
  28. 20
  29. 31
  30. 3481
  31. 412
  32. 44.65
  33. correct
  34. 279
  35. 228
  36. wrong
  37. 350
  38. 163
  39. 210
  40. 195

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