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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 66 · 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. 1.531 − 59 =
  2. 2.52 × 5 =
  3. 3.9 + 1 + 1 + 9 =
  4. 4.89 + 67 + 58 + 48 =
  5. 5.Best estimate of 799 × 8? (a) 12800 (b) 640 (c) 6400 (d) 64000
  6. 6.130 − 27 =
  7. 7.11 × 15 =
  8. 8.59 × 8 =
  9. 9.425 ÷ 25 =
  10. 10.11 × 15 =
  11. 11.39 × 8 =
  12. 12.19 × 18 =
  13. 13.1350 ÷ 50 =
  14. 14.₹9.25 + ₹13.55 =
  15. 15.15 + 59 + 78 + 82 =
  16. 16.2 + 1 + 8 + 8 + 3 =
  17. 17.161 − 79 =
  18. 18.₹99.10 + ₹36.25 =
  19. 19.Best estimate of 51 × 71? (a) 350 (b) 35000 (c) 3500 (d) 7000
  20. 20.71² =
  21. 21.490 + 38 =
  22. 22.₹24.20 − ₹23.40 =
  23. 23.₹44.55 − ₹33.35 =
  24. 24.20% of 230 =
  25. 25.Best estimate of 21 × 61? (a) 1200 (b) 120 (c) 12000 (d) 2400
  26. 26.Best estimate of 98 × 8? (a) 1600 (b) 800 (c) 80 (d) 8000
  27. 27.47 + 17 =
  28. 28.₹50.90 − ₹44.55 =
  29. 29.875 ÷ 25 =
  30. 30.497 + 69 =
  31. 31.Best estimate of 39 × 81? (a) 320 (b) 3200 (c) 6400 (d) 32000
  32. 32.39² =
  33. 33.36 × 5 =
  34. 34.9 + 6 + 6 + 7 + 4 =
  35. 35.74 × 5 =
  36. 36.1 + 3 + 2 + 8 + 5 =
  37. 37.1 + 7 + 4 + 6 + 3 =
  38. 38.275 − 26 =
  39. 39.1% of 160 =
  40. 40.₹87.65 + ₹35.80 =

Answer key

  1. 472
  2. 260
  3. 20
  4. 262
  5. 6400
  6. 103
  7. 165
  8. 472
  9. 17
  10. 165
  11. 312
  12. 342
  13. 27
  14. 22.8
  15. 234
  16. 22
  17. 82
  18. 135.35
  19. 3500
  20. 5041
  21. 528
  22. 0.8
  23. 11.2
  24. 46
  25. 1200
  26. 800
  27. 64
  28. 6.35
  29. 35
  30. 566
  31. 3200
  32. 1521
  33. 180
  34. 32
  35. 370
  36. 19
  37. 21
  38. 249
  39. 1.6
  40. 123.45

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