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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 907 · 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. 1.57 + 86 + 24 + 81 =
  2. 2.15% of 90 =
  3. 3.Check with nines: 580 + 314 = 887. Correct or wrong? (a) correct (b) wrong
  4. 4.63 × 15 =
  5. 5.426 + 78 =
  6. 6.₹43.25 + ₹49.15 =
  7. 7.13 × 16 =
  8. 8.₹9.75 + ₹48.80 =
  9. 9.8 + 8 + 4 + 2 =
  10. 10.₹42.40 + ₹22.50 =
  11. 11.51² =
  12. 12.121 × 4 =
  13. 13.825 ÷ 25 =
  14. 14.31² =
  15. 15.9 + 5 + 9 + 1 =
  16. 16.Best estimate of 31 × 79? (a) 2400 (b) 4800 (c) 240 (d) 24000
  17. 17.370 + 97 =
  18. 18.₹87.60 − ₹36.90 =
  19. 19.382 − 98 =
  20. 20.Check with nines: 23 × 13 = 299. Correct or wrong? (a) wrong (b) correct
  21. 21.Best estimate of 598 × 8? (a) 480 (b) 9600 (c) 4800 (d) 48000
  22. 22.5% of 160 =
  23. 23.10% of 20 =
  24. 24.235 + 17 =
  25. 25.250 ÷ 50 =
  26. 26.3 + 7 + 2 + 4 =
  27. 27.590 ÷ 5 =
  28. 28.6 + 8 + 3 + 5 + 4 =
  29. 29.9 + 4 + 7 + 1 =
  30. 30.79² =
  31. 31.37 × 15 =
  32. 32.31² =
  33. 33.233 + 98 =
  34. 34.13 × 8 =
  35. 35.₹86.10 + ₹4.20 =
  36. 36.32 × 8 =
  37. 37.209 − 59 =
  38. 38.Check with nines: 99 × 44 = 4356. Correct or wrong? (a) wrong (b) correct
  39. 39.35 × 4 =
  40. 40.24 × 50 =

Answer key

  1. 248
  2. 13.5
  3. wrong
  4. 945
  5. 504
  6. 92.4
  7. 208
  8. 58.55
  9. 22
  10. 64.9
  11. 2601
  12. 484
  13. 33
  14. 961
  15. 24
  16. 2400
  17. 467
  18. 50.7
  19. 284
  20. correct
  21. 4800
  22. 8
  23. 2
  24. 252
  25. 5
  26. 16
  27. 118
  28. 26
  29. 21
  30. 6241
  31. 555
  32. 961
  33. 331
  34. 104
  35. 90.3
  36. 256
  37. 150
  38. correct
  39. 140
  40. 1200

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