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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 511 · 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. 1.18 × 18 =
  2. 2.30 + 15 + 60 + 43 =
  3. 3.9 + 2 + 6 + 1 =
  4. 4.34 × 8 =
  5. 5.530 − 29 =
  6. 6.16 × 15 =
  7. 7.50% of 230 =
  8. 8.327 + 67 =
  9. 9.10% of 410 =
  10. 10.Check with nines: 647 + 236 = 891. Correct or wrong? (a) wrong (b) correct
  11. 11.399 − 37 =
  12. 12.168 + 87 =
  13. 13.39² =
  14. 14.26 + 97 =
  15. 15.705 ÷ 5 =
  16. 16.478 − 56 =
  17. 17.190 + 89 =
  18. 18.384 + 29 =
  19. 19.13 × 11 =
  20. 20.₹79.10 − ₹44.65 =
  21. 21.23 × 15 =
  22. 22.50% of 490 =
  23. 23.13 + 66 + 69 + 76 =
  24. 24.31² =
  25. 25.Best estimate of 78 × 42? (a) 6400 (b) 3200 (c) 320 (d) 32000
  26. 26.16 + 66 + 30 + 31 =
  27. 27.₹94.10 − ₹46.45 =
  28. 28.20% of 790 =
  29. 29.53 + 63 + 65 + 37 =
  30. 30.13 × 5 =
  31. 31.21² =
  32. 32.69² =
  33. 33.17 + 38 + 47 + 54 =
  34. 34.308 + 19 =
  35. 35.225 ÷ 25 =
  36. 36.73 + 55 + 49 + 59 =
  37. 37.Best estimate of 21 × 61? (a) 1200 (b) 120 (c) 12000 (d) 2400
  38. 38.6 + 4 + 6 + 9 + 6 =
  39. 39.71² =
  40. 40.397 + 69 =

Answer key

  1. 324
  2. 148
  3. 18
  4. 272
  5. 501
  6. 240
  7. 115
  8. 394
  9. 41
  10. wrong
  11. 362
  12. 255
  13. 1521
  14. 123
  15. 141
  16. 422
  17. 279
  18. 413
  19. 143
  20. 34.45
  21. 345
  22. 245
  23. 224
  24. 961
  25. 3200
  26. 143
  27. 47.65
  28. 158
  29. 218
  30. 65
  31. 441
  32. 4761
  33. 156
  34. 327
  35. 9
  36. 236
  37. 1200
  38. 31
  39. 5041
  40. 466

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