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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 169 · 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 × 5 =
  2. 2.79² =
  3. 3.63 + 77 + 77 + 26 =
  4. 4.Best estimate of 101 × 5? (a) 5000 (b) 50 (c) 1000 (d) 500
  5. 5.8 + 2 + 1 + 3 + 1 =
  6. 6.Best estimate of 28 × 58? (a) 18000 (b) 180 (c) 3600 (d) 1800
  7. 7.270 − 79 =
  8. 8.299 − 26 =
  9. 9.131 − 37 =
  10. 10.₹80.90 + ₹2.20 =
  11. 11.154 × 4 =
  12. 12.20 × 5 =
  13. 13.925 ÷ 25 =
  14. 14.₹46.70 + ₹45.20 =
  15. 15.₹39.50 + ₹14.60 =
  16. 16.36 × 15 =
  17. 17.54 × 15 =
  18. 18.91² =
  19. 19.Check with nines: 307 + 404 = 708. Correct or wrong? (a) wrong (b) correct
  20. 20.5 + 8 + 7 + 2 =
  21. 21.Best estimate of 79 × 31? (a) 240 (b) 4800 (c) 24000 (d) 2400
  22. 22.100 ÷ 5 =
  23. 23.14 × 19 =
  24. 24.50 × 4 =
  25. 25.75 × 50 =
  26. 26.321 + 77 =
  27. 27.78 × 4 =
  28. 28.5 + 3 + 2 + 7 + 7 =
  29. 29.453 + 68 =
  30. 30.64 × 50 =
  31. 31.20% of 280 =
  32. 32.95 × 50 =
  33. 33.51² =
  34. 34.780 ÷ 5 =
  35. 35.48 × 50 =
  36. 36.4 + 5 + 3 + 7 =
  37. 37.80 × 5 =
  38. 38.Check with nines: 801 + 638 = 1446. Correct or wrong? (a) correct (b) wrong
  39. 39.41² =
  40. 40.51² =

Answer key

  1. 90
  2. 6241
  3. 243
  4. 500
  5. 15
  6. 1800
  7. 191
  8. 273
  9. 94
  10. 83.1
  11. 616
  12. 100
  13. 37
  14. 91.9
  15. 54.1
  16. 540
  17. 810
  18. 8281
  19. wrong
  20. 22
  21. 2400
  22. 20
  23. 266
  24. 200
  25. 3750
  26. 398
  27. 312
  28. 24
  29. 521
  30. 3200
  31. 56
  32. 4750
  33. 2601
  34. 156
  35. 2400
  36. 19
  37. 400
  38. wrong
  39. 1681
  40. 2601

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