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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 140 · 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. 1.25 × 15 =
  2. 2.Best estimate of 92 × 62? (a) 10800 (b) 540 (c) 5400 (d) 54000
  3. 3.91 × 50 =
  4. 4.Best estimate of 32 × 69? (a) 2100 (b) 210 (c) 4200 (d) 21000
  5. 5.64 × 15 =
  6. 6.50% of 230 =
  7. 7.25% of 250 =
  8. 8.10% of 90 =
  9. 9.93 × 5 =
  10. 10.120 + 78 =
  11. 11.358 − 66 =
  12. 12.28 + 64 + 14 + 89 =
  13. 13.583 − 18 =
  14. 14.15% of 700 =
  15. 15.Best estimate of 82 × 29? (a) 4800 (b) 240 (c) 2400 (d) 24000
  16. 16.67 + 18 + 12 + 59 =
  17. 17.41² =
  18. 18.51 × 50 =
  19. 19.Check with nines: 381 + 554 = 937. Correct or wrong? (a) wrong (b) correct
  20. 20.Best estimate of 199 × 3? (a) 1200 (b) 600 (c) 60 (d) 6000
  21. 21.9 × 15 =
  22. 22.2 + 5 + 4 + 8 + 6 =
  23. 23.133 × 4 =
  24. 24.11 × 14 =
  25. 25.Best estimate of 29 × 22? (a) 60 (b) 6000 (c) 1200 (d) 600
  26. 26.283 − 99 =
  27. 27.46 × 8 =
  28. 28.19² =
  29. 29.140 × 4 =
  30. 30.7 + 1 + 9 + 3 =
  31. 31.14 × 19 =
  32. 32.13 + 77 + 24 + 54 =
  33. 33.₹10.70 − ₹7.50 =
  34. 34.225 ÷ 25 =
  35. 35.300 ÷ 50 =
  36. 36.₹34.15 − ₹16.25 =
  37. 37.215 + 18 =
  38. 38.15 × 16 =
  39. 39.21² =
  40. 40.18 × 15 =

Answer key

  1. 375
  2. 5400
  3. 4550
  4. 2100
  5. 960
  6. 115
  7. 62.5
  8. 9
  9. 465
  10. 198
  11. 292
  12. 195
  13. 565
  14. 105
  15. 2400
  16. 156
  17. 1681
  18. 2550
  19. wrong
  20. 600
  21. 135
  22. 25
  23. 532
  24. 154
  25. 600
  26. 184
  27. 368
  28. 361
  29. 560
  30. 20
  31. 266
  32. 168
  33. 3.2
  34. 9
  35. 6
  36. 17.9
  37. 233
  38. 240
  39. 441
  40. 270

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