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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 631 · 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. 1.41 × 15 =
  2. 2.39² =
  3. 3.596 − 67 =
  4. 4.1 + 5 + 4 + 9 + 6 =
  5. 5.31 × 15 =
  6. 6.6 + 9 + 2 + 8 =
  7. 7.Best estimate of 301 × 4? (a) 2400 (b) 1200 (c) 120 (d) 12000
  8. 8.8 × 15 =
  9. 9.14 × 50 =
  10. 10.₹12.35 + ₹6.10 =
  11. 11.372 + 98 =
  12. 12.36 + 78 + 30 + 18 =
  13. 13.17 × 11 =
  14. 14.7 + 3 + 7 + 1 =
  15. 15.31² =
  16. 16.Check with nines: 247 + 193 = 445. Correct or wrong? (a) correct (b) wrong
  17. 17.₹67.95 − ₹37.35 =
  18. 18.₹25.80 − ₹20.20 =
  19. 19.17 × 16 =
  20. 20.23 × 50 =
  21. 21.Check with nines: 74 × 15 = 1110. Correct or wrong? (a) correct (b) wrong
  22. 22.27 × 15 =
  23. 23.5% of 320 =
  24. 24.53 × 4 =
  25. 25.51² =
  26. 26.83 + 89 =
  27. 27.2 + 4 + 9 + 6 =
  28. 28.13 × 12 =
  29. 29.88 + 58 =
  30. 30.Check with nines: 28 × 34 = 952. Correct or wrong? (a) wrong (b) correct
  31. 31.61² =
  32. 32.545 ÷ 5 =
  33. 33.19 × 15 =
  34. 34.80 × 50 =
  35. 35.12 × 15 =
  36. 36.117 + 47 =
  37. 37.1% of 170 =
  38. 38.Check with nines: 21 × 56 = 1168. Correct or wrong? (a) wrong (b) correct
  39. 39.98 × 50 =
  40. 40.₹42.80 + ₹18.75 =

Answer key

  1. 615
  2. 1521
  3. 529
  4. 25
  5. 465
  6. 25
  7. 1200
  8. 120
  9. 700
  10. 18.45
  11. 470
  12. 162
  13. 187
  14. 18
  15. 961
  16. wrong
  17. 30.6
  18. 5.6
  19. 272
  20. 1150
  21. correct
  22. 405
  23. 16
  24. 212
  25. 2601
  26. 172
  27. 21
  28. 156
  29. 146
  30. correct
  31. 3721
  32. 109
  33. 285
  34. 4000
  35. 180
  36. 164
  37. 1.7
  38. wrong
  39. 4900
  40. 61.55

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