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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 429 · 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. 1.24 × 8 =
  2. 2.89² =
  3. 3.70 × 4 =
  4. 4.₹73.10 − ₹41.55 =
  5. 5.17 × 15 =
  6. 6.46 × 15 =
  7. 7.284 − 19 =
  8. 8.11 × 13 =
  9. 9.4 + 1 + 6 + 9 + 4 =
  10. 10.₹30.90 − ₹8.30 =
  11. 11.184 − 28 =
  12. 12.32 + 69 =
  13. 13.610 ÷ 5 =
  14. 14.378 − 67 =
  15. 15.19² =
  16. 16.176 − 88 =
  17. 17.16 + 39 + 26 + 59 =
  18. 18.Best estimate of 18 × 48? (a) 2000 (b) 1000 (c) 100 (d) 10000
  19. 19.11 × 15 =
  20. 20.349 + 77 =
  21. 21.15 × 50 =
  22. 22.Check with nines: 99 × 55 = 5449. Correct or wrong? (a) correct (b) wrong
  23. 23.33 × 4 =
  24. 24.33 × 50 =
  25. 25.Best estimate of 797 × 5? (a) 8000 (b) 400 (c) 40000 (d) 4000
  26. 26.89² =
  27. 27.875 ÷ 5 =
  28. 28.80 + 28 =
  29. 29.5 + 3 + 5 + 5 =
  30. 30.Best estimate of 38 × 41? (a) 160 (b) 16000 (c) 1600 (d) 3200
  31. 31.61² =
  32. 32.1% of 100 =
  33. 33.73 × 50 =
  34. 34.26 × 15 =
  35. 35.Best estimate of 198 × 5? (a) 10000 (b) 100 (c) 2000 (d) 1000
  36. 36.35 × 15 =
  37. 37.62 × 15 =
  38. 38.372 + 27 =
  39. 39.15% of 710 =
  40. 40.45 × 15 =

Answer key

  1. 192
  2. 7921
  3. 280
  4. 31.55
  5. 255
  6. 690
  7. 265
  8. 143
  9. 24
  10. 22.6
  11. 156
  12. 101
  13. 122
  14. 311
  15. 361
  16. 88
  17. 140
  18. 1000
  19. 165
  20. 426
  21. 750
  22. wrong
  23. 132
  24. 1650
  25. 4000
  26. 7921
  27. 175
  28. 108
  29. 18
  30. 1600
  31. 3721
  32. 1
  33. 3650
  34. 390
  35. 1000
  36. 525
  37. 930
  38. 399
  39. 106.5
  40. 675

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