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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 331 · 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.Check with nines: 85 × 28 = 2376. Correct or wrong? (a) correct (b) wrong
  2. 2.19 × 11 =
  3. 3.257 + 59 =
  4. 4.62 × 8 =
  5. 5.381 + 78 =
  6. 6.21 × 50 =
  7. 7.12 × 13 =
  8. 8.155 ÷ 5 =
  9. 9.428 − 37 =
  10. 10.35 × 15 =
  11. 11.50 × 8 =
  12. 12.13 + 35 + 45 + 27 =
  13. 13.9 + 5 + 5 + 1 + 7 =
  14. 14.Best estimate of 799 × 4? (a) 320 (b) 6400 (c) 3200 (d) 32000
  15. 15.49 + 36 + 75 + 27 =
  16. 16.313 + 88 =
  17. 17.75 + 97 =
  18. 18.310 ÷ 5 =
  19. 19.Check with nines: 524 + 789 = 1312. Correct or wrong? (a) correct (b) wrong
  20. 20.67 × 5 =
  21. 21.41 × 4 =
  22. 22.67 × 8 =
  23. 23.17 × 5 =
  24. 24.14 × 18 =
  25. 25.30 + 37 + 24 + 89 =
  26. 26.76 × 5 =
  27. 27.₹26.40 − ₹25.30 =
  28. 28.26 × 15 =
  29. 29.21² =
  30. 30.9 × 15 =
  31. 31.1% of 410 =
  32. 32.₹30.25 + ₹30.25 =
  33. 33.139 − 37 =
  34. 34.6 + 7 + 1 + 5 + 3 =
  35. 35.₹93.60 − ₹5.50 =
  36. 36.Check with nines: 81 × 42 = 3399. Correct or wrong? (a) correct (b) wrong
  37. 37.19² =
  38. 38.564 − 38 =
  39. 39.11 × 15 =
  40. 40.125 ÷ 25 =

Answer key

  1. wrong
  2. 209
  3. 316
  4. 496
  5. 459
  6. 1050
  7. 156
  8. 31
  9. 391
  10. 525
  11. 400
  12. 120
  13. 27
  14. 3200
  15. 187
  16. 401
  17. 172
  18. 62
  19. wrong
  20. 335
  21. 164
  22. 536
  23. 85
  24. 252
  25. 180
  26. 380
  27. 1.1
  28. 390
  29. 441
  30. 135
  31. 4.1
  32. 60.5
  33. 102
  34. 22
  35. 88.1
  36. wrong
  37. 361
  38. 526
  39. 165
  40. 5

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