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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 727 · 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. 1.358 − 38 =
  2. 2.7 + 2 + 5 + 8 + 2 =
  3. 3.598 − 36 =
  4. 4.17 + 36 + 34 + 75 =
  5. 5.31² =
  6. 6.9 + 7 + 1 + 4 =
  7. 7.23 × 50 =
  8. 8.16 × 16 =
  9. 9.₹51.15 − ₹30.60 =
  10. 10.63 × 15 =
  11. 11.10% of 20 =
  12. 12.71 + 66 + 11 + 73 =
  13. 13.96 × 5 =
  14. 14.3 + 7 + 7 + 1 + 8 =
  15. 15.250 ÷ 50 =
  16. 16.19 + 75 + 38 + 64 =
  17. 17.3 + 8 + 7 + 1 + 5 =
  18. 18.15 × 15 =
  19. 19.69² =
  20. 20.65 + 34 + 72 + 65 =
  21. 21.79 × 50 =
  22. 22.475 ÷ 25 =
  23. 23.19 × 17 =
  24. 24.10% of 140 =
  25. 25.18 × 4 =
  26. 26.Best estimate of 78 × 91? (a) 14400 (b) 720 (c) 7200 (d) 72000
  27. 27.390 + 38 =
  28. 28.₹82.10 + ₹11.05 =
  29. 29.496 − 47 =
  30. 30.516 − 86 =
  31. 31.466 + 89 =
  32. 32.76 × 50 =
  33. 33.58 + 48 + 86 + 26 =
  34. 34.₹28.70 − ₹5.15 =
  35. 35.30 × 15 =
  36. 36.12 × 8 =
  37. 37.16 × 12 =
  38. 38.Best estimate of 38 × 78? (a) 32000 (b) 3200 (c) 6400 (d) 320
  39. 39.14 × 12 =
  40. 40.36 × 15 =

Answer key

  1. 320
  2. 24
  3. 562
  4. 162
  5. 961
  6. 21
  7. 1150
  8. 256
  9. 20.55
  10. 945
  11. 2
  12. 221
  13. 480
  14. 26
  15. 5
  16. 196
  17. 24
  18. 225
  19. 4761
  20. 236
  21. 3950
  22. 19
  23. 323
  24. 14
  25. 72
  26. 7200
  27. 428
  28. 93.15
  29. 449
  30. 430
  31. 555
  32. 3800
  33. 218
  34. 23.55
  35. 450
  36. 96
  37. 192
  38. 3200
  39. 168
  40. 540

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