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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 940 · 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. 1.146 × 4 =
  2. 2.10 × 15 =
  3. 3.77 × 5 =
  4. 4.52 + 77 + 36 + 75 =
  5. 5.840 ÷ 5 =
  6. 6.71² =
  7. 7.42 × 5 =
  8. 8.589 − 17 =
  9. 9.9 + 9 + 1 + 1 =
  10. 10.15 × 15 =
  11. 11.Check with nines: 728 + 368 = 1098. Correct or wrong? (a) correct (b) wrong
  12. 12.193 + 27 =
  13. 13.19² =
  14. 14.46 × 50 =
  15. 15.₹62.15 − ₹32.70 =
  16. 16.8 + 5 + 2 + 2 + 9 =
  17. 17.159 × 4 =
  18. 18.192 + 28 =
  19. 19.52 × 8 =
  20. 20.Best estimate of 78 × 71? (a) 5600 (b) 56000 (c) 560 (d) 11200
  21. 21.106 + 17 =
  22. 22.32 + 68 + 25 + 33 =
  23. 23.₹63.75 + ₹39.10 =
  24. 24.₹42.50 − ₹3.55 =
  25. 25.429 − 58 =
  26. 26.Best estimate of 41 × 71? (a) 5600 (b) 280 (c) 2800 (d) 28000
  27. 27.145 − 97 =
  28. 28.7 + 9 + 9 + 2 + 1 =
  29. 29.1% of 50 =
  30. 30.366 + 79 =
  31. 31.56 × 4 =
  32. 32.16 × 11 =
  33. 33.775 ÷ 5 =
  34. 34.189 − 79 =
  35. 35.54 × 15 =
  36. 36.11 × 12 =
  37. 37.58 × 15 =
  38. 38.Best estimate of 72 × 39? (a) 28000 (b) 5600 (c) 280 (d) 2800
  39. 39.₹5.70 + ₹48.95 =
  40. 40.39² =

Answer key

  1. 584
  2. 150
  3. 385
  4. 240
  5. 168
  6. 5041
  7. 210
  8. 572
  9. 20
  10. 225
  11. wrong
  12. 220
  13. 361
  14. 2300
  15. 29.45
  16. 26
  17. 636
  18. 220
  19. 416
  20. 5600
  21. 123
  22. 158
  23. 102.85
  24. 38.95
  25. 371
  26. 2800
  27. 48
  28. 28
  29. 0.5
  30. 445
  31. 224
  32. 176
  33. 155
  34. 110
  35. 810
  36. 132
  37. 870
  38. 2800
  39. 54.65
  40. 1521

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