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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 838 · 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. 1.553 − 47 =
  2. 2.21² =
  3. 3.Check with nines: 20 × 28 = 566. Correct or wrong? (a) correct (b) wrong
  4. 4.16 × 11 =
  5. 5.40 × 15 =
  6. 6.8 + 2 + 6 + 4 =
  7. 7.72 + 35 + 61 + 61 =
  8. 8.48 × 8 =
  9. 9.31 × 8 =
  10. 10.14 × 17 =
  11. 11.177 + 17 =
  12. 12.₹83.90 − ₹5.50 =
  13. 13.570 − 98 =
  14. 14.167 + 97 =
  15. 15.1 + 9 + 7 + 1 =
  16. 16.87 + 97 =
  17. 17.Best estimate of 49 × 29? (a) 3000 (b) 150 (c) 1500 (d) 15000
  18. 18.540 − 76 =
  19. 19.Best estimate of 98 × 3? (a) 3000 (b) 600 (c) 30 (d) 300
  20. 20.69² =
  21. 21.16 × 5 =
  22. 22.12 × 12 =
  23. 23.18 × 14 =
  24. 24.333 − 29 =
  25. 25.875 ÷ 25 =
  26. 26.15% of 830 =
  27. 27.16 × 8 =
  28. 28.31 + 19 =
  29. 29.97 − 76 =
  30. 30.499 + 27 =
  31. 31.57 + 86 + 18 + 43 =
  32. 32.31² =
  33. 33.3 + 9 + 6 + 4 =
  34. 34.61 + 98 =
  35. 35.65 × 8 =
  36. 36.15 × 14 =
  37. 37.39 + 11 + 34 + 71 =
  38. 38.60 − 38 =
  39. 39.123 − 88 =
  40. 40.1% of 770 =

Answer key

  1. 506
  2. 441
  3. wrong
  4. 176
  5. 600
  6. 20
  7. 229
  8. 384
  9. 248
  10. 238
  11. 194
  12. 78.4
  13. 472
  14. 264
  15. 18
  16. 184
  17. 1500
  18. 464
  19. 300
  20. 4761
  21. 80
  22. 144
  23. 252
  24. 304
  25. 35
  26. 124.5
  27. 128
  28. 50
  29. 21
  30. 526
  31. 204
  32. 961
  33. 22
  34. 159
  35. 520
  36. 210
  37. 155
  38. 22
  39. 35
  40. 7.7

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