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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 246 · 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.₹86.05 − ₹45.60 =
  2. 2.492 + 47 =
  3. 3.29² =
  4. 4.6 + 3 + 5 + 7 + 7 =
  5. 5.19 × 14 =
  6. 6.102 × 4 =
  7. 7.1175 ÷ 25 =
  8. 8.322 − 49 =
  9. 9.61² =
  10. 10.35 × 15 =
  11. 11.389 − 49 =
  12. 12.214 + 98 =
  13. 13.₹98.15 − ₹19.85 =
  14. 14.393 + 68 =
  15. 15.Best estimate of 899 × 8? (a) 72000 (b) 14400 (c) 7200 (d) 720
  16. 16.Best estimate of 19 × 38? (a) 8000 (b) 80 (c) 1600 (d) 800
  17. 17.52 × 5 =
  18. 18.1500 ÷ 50 =
  19. 19.38 × 5 =
  20. 20.29² =
  21. 21.102 − 47 =
  22. 22.265 + 38 =
  23. 23.46 × 15 =
  24. 24.130 ÷ 5 =
  25. 25.89² =
  26. 26.Best estimate of 91 × 51? (a) 45000 (b) 4500 (c) 450 (d) 9000
  27. 27.8 + 3 + 6 + 2 =
  28. 28.42 + 71 + 68 + 20 =
  29. 29.186 + 48 =
  30. 30.₹68.55 − ₹21.75 =
  31. 31.44 × 50 =
  32. 32.42 + 79 + 22 + 32 =
  33. 33.15% of 690 =
  34. 34.₹10.30 + ₹6.10 =
  35. 35.36 + 74 + 59 + 12 =
  36. 36.187 + 48 =
  37. 37.Check with nines: 33 × 79 = 2615. Correct or wrong? (a) wrong (b) correct
  38. 38.Check with nines: 65 × 54 = 3510. Correct or wrong? (a) correct (b) wrong
  39. 39.44 × 15 =
  40. 40.₹83.95 − ₹15.80 =

Answer key

  1. 40.45
  2. 539
  3. 841
  4. 28
  5. 266
  6. 408
  7. 47
  8. 273
  9. 3721
  10. 525
  11. 340
  12. 312
  13. 78.3
  14. 461
  15. 7200
  16. 800
  17. 260
  18. 30
  19. 190
  20. 841
  21. 55
  22. 303
  23. 690
  24. 26
  25. 7921
  26. 4500
  27. 19
  28. 201
  29. 234
  30. 46.8
  31. 2200
  32. 175
  33. 103.5
  34. 16.4
  35. 181
  36. 235
  37. wrong
  38. correct
  39. 660
  40. 68.15

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