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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 783 · 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 × 15 =
  2. 2.46 × 15 =
  3. 3.200 ÷ 50 =
  4. 4.450 − 69 =
  5. 5.19 + 83 + 68 + 79 =
  6. 6.85 − 37 =
  7. 7.950 ÷ 25 =
  8. 8.Best estimate of 302 × 4? (a) 120 (b) 1200 (c) 12000 (d) 2400
  9. 9.₹10.85 + ₹23.65 =
  10. 10.800 ÷ 25 =
  11. 11.167 − 19 =
  12. 12.1% of 60 =
  13. 13.79 × 4 =
  14. 14.181 + 28 =
  15. 15.123 × 4 =
  16. 16.25 × 15 =
  17. 17.Best estimate of 82 × 19? (a) 1600 (b) 3200 (c) 16000 (d) 160
  18. 18.53 + 38 =
  19. 19.Best estimate of 49 × 78? (a) 40000 (b) 8000 (c) 400 (d) 4000
  20. 20.146 + 38 =
  21. 21.164 + 67 =
  22. 22.79 + 87 + 60 + 76 =
  23. 23.115 ÷ 5 =
  24. 24.57 × 50 =
  25. 25.Check with nines: 23 × 45 = 1028. Correct or wrong? (a) wrong (b) correct
  26. 26.56 − 38 =
  27. 27.33 × 5 =
  28. 28.72 × 5 =
  29. 29.75 − 28 =
  30. 30.Check with nines: 241 + 191 = 438. Correct or wrong? (a) wrong (b) correct
  31. 31.₹6.95 + ₹25.20 =
  32. 32.2 + 4 + 1 + 3 + 8 =
  33. 33.33 × 15 =
  34. 34.20% of 810 =
  35. 35.49 × 5 =
  36. 36.361 + 28 =
  37. 37.500 ÷ 50 =
  38. 38.93 × 50 =
  39. 39.534 − 19 =
  40. 40.443 + 68 =

Answer key

  1. 255
  2. 690
  3. 4
  4. 381
  5. 249
  6. 48
  7. 38
  8. 1200
  9. 34.5
  10. 32
  11. 148
  12. 0.6
  13. 316
  14. 209
  15. 492
  16. 375
  17. 1600
  18. 91
  19. 4000
  20. 184
  21. 231
  22. 302
  23. 23
  24. 2850
  25. wrong
  26. 18
  27. 165
  28. 360
  29. 47
  30. wrong
  31. 32.15
  32. 18
  33. 495
  34. 162
  35. 245
  36. 389
  37. 10
  38. 4650
  39. 515
  40. 511

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