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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 305 · 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. 1.81² =
  2. 2.1050 ÷ 25 =
  3. 3.107 × 4 =
  4. 4.7 + 2 + 5 + 5 + 7 =
  5. 5.4 + 5 + 5 + 4 =
  6. 6.18 × 19 =
  7. 7.12 × 11 =
  8. 8.21² =
  9. 9.940 ÷ 5 =
  10. 10.341 − 46 =
  11. 11.116 + 27 =
  12. 12.₹12.35 − ₹10.80 =
  13. 13.3 + 6 + 9 + 7 =
  14. 14.174 + 48 =
  15. 15.Best estimate of 399 × 8? (a) 32000 (b) 320 (c) 3200 (d) 6400
  16. 16.4 + 8 + 5 + 6 + 1 =
  17. 17.Check with nines: 92 × 31 = 2858. Correct or wrong? (a) correct (b) wrong
  18. 18.6 × 15 =
  19. 19.₹94.75 + ₹43.90 =
  20. 20.Best estimate of 99 × 4? (a) 4000 (b) 800 (c) 40 (d) 400
  21. 21.13 × 11 =
  22. 22.300 ÷ 25 =
  23. 23.Check with nines: 12 × 18 = 216. Correct or wrong? (a) correct (b) wrong
  24. 24.1000 ÷ 50 =
  25. 25.21 × 8 =
  26. 26.2 + 7 + 1 + 8 =
  27. 27.18 × 16 =
  28. 28.21² =
  29. 29.₹89.70 + ₹37.50 =
  30. 30.66 + 46 + 39 + 33 =
  31. 31.13 × 18 =
  32. 32.₹94.90 + ₹39.10 =
  33. 33.₹33.20 + ₹22.50 =
  34. 34.20 × 15 =
  35. 35.45 + 38 =
  36. 36.281 + 17 =
  37. 37.200 ÷ 50 =
  38. 38.79² =
  39. 39.Check with nines: 80 × 62 = 4953. Correct or wrong? (a) wrong (b) correct
  40. 40.53 × 5 =

Answer key

  1. 6561
  2. 42
  3. 428
  4. 26
  5. 18
  6. 342
  7. 132
  8. 441
  9. 188
  10. 295
  11. 143
  12. 1.55
  13. 25
  14. 222
  15. 3200
  16. 24
  17. wrong
  18. 90
  19. 138.65
  20. 400
  21. 143
  22. 12
  23. correct
  24. 20
  25. 168
  26. 18
  27. 288
  28. 441
  29. 127.2
  30. 184
  31. 234
  32. 134
  33. 55.7
  34. 300
  35. 83
  36. 298
  37. 4
  38. 6241
  39. wrong
  40. 265

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