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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 888 · 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. 1.17 × 18 =
  2. 2.15 × 16 =
  3. 3.69 + 79 + 45 + 23 =
  4. 4.₹57.25 − ₹6.50 =
  5. 5.₹18.60 + ₹39.85 =
  6. 6.29 × 15 =
  7. 7.23 × 15 =
  8. 8.33 × 50 =
  9. 9.3 + 2 + 3 + 7 =
  10. 10.31 × 4 =
  11. 11.23 × 15 =
  12. 12.Best estimate of 899 × 8? (a) 72000 (b) 14400 (c) 720 (d) 7200
  13. 13.81² =
  14. 14.41² =
  15. 15.21² =
  16. 16.1200 ÷ 50 =
  17. 17.43 × 50 =
  18. 18.9 + 6 + 4 + 7 =
  19. 19.42 × 15 =
  20. 20.29² =
  21. 21.7 + 7 + 8 + 1 + 3 =
  22. 22.45 + 21 + 24 + 53 =
  23. 23.7 + 3 + 1 + 7 =
  24. 24.₹39.65 − ₹15.85 =
  25. 25.8 × 15 =
  26. 26.1% of 700 =
  27. 27.27 + 57 + 89 + 23 =
  28. 28.56 − 28 =
  29. 29.520 − 88 =
  30. 30.Best estimate of 598 × 8? (a) 9600 (b) 480 (c) 4800 (d) 48000
  31. 31.325 ÷ 25 =
  32. 32.43 × 4 =
  33. 33.Best estimate of 31 × 78? (a) 4800 (b) 24000 (c) 2400 (d) 240
  34. 34.600 ÷ 50 =
  35. 35.1 + 2 + 1 + 9 =
  36. 36.76 − 19 =
  37. 37.170 + 58 =
  38. 38.Check with nines: 625 + 605 = 1235. Correct or wrong? (a) wrong (b) correct
  39. 39.31 + 60 + 12 + 20 =
  40. 40.15 × 18 =

Answer key

  1. 306
  2. 240
  3. 216
  4. 50.75
  5. 58.45
  6. 435
  7. 345
  8. 1650
  9. 15
  10. 124
  11. 345
  12. 7200
  13. 6561
  14. 1681
  15. 441
  16. 24
  17. 2150
  18. 26
  19. 630
  20. 841
  21. 26
  22. 143
  23. 18
  24. 23.8
  25. 120
  26. 7
  27. 196
  28. 28
  29. 432
  30. 4800
  31. 13
  32. 172
  33. 2400
  34. 12
  35. 13
  36. 57
  37. 228
  38. wrong
  39. 123
  40. 270

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