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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 70 · 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. 1.750 ÷ 25 =
  2. 2.17 × 18 =
  3. 3.3 + 6 + 6 + 4 =
  4. 4.1% of 860 =
  5. 5.45 + 78 + 75 + 31 =
  6. 6.258 + 17 =
  7. 7.11 × 19 =
  8. 8.415 − 16 =
  9. 9.₹45.05 + ₹9.35 =
  10. 10.Best estimate of 88 × 39? (a) 360 (b) 7200 (c) 36000 (d) 3600
  11. 11.15 × 17 =
  12. 12.91² =
  13. 13.19 × 16 =
  14. 14.318 − 98 =
  15. 15.266 + 37 =
  16. 16.₹33.90 + ₹47.20 =
  17. 17.89² =
  18. 18.60 × 5 =
  19. 19.₹93.20 + ₹11.70 =
  20. 20.57 + 65 + 81 + 66 =
  21. 21.₹73.35 + ₹10.25 =
  22. 22.90 × 50 =
  23. 23.3 + 5 + 6 + 5 =
  24. 24.4 + 1 + 6 + 1 =
  25. 25.₹83.70 + ₹14.50 =
  26. 26.Check with nines: 14 × 89 = 1248. Correct or wrong? (a) correct (b) wrong
  27. 27.13 + 29 + 76 + 71 =
  28. 28.₹59.85 + ₹38.30 =
  29. 29.62 × 50 =
  30. 30.Check with nines: 34 × 16 = 544. Correct or wrong? (a) wrong (b) correct
  31. 31.69 × 4 =
  32. 32.359 + 19 =
  33. 33.Check with nines: 35 × 21 = 734. Correct or wrong? (a) correct (b) wrong
  34. 34.2 + 6 + 6 + 4 =
  35. 35.500 − 97 =
  36. 36.6 + 8 + 6 + 7 + 4 =
  37. 37.₹52.15 + ₹33.10 =
  38. 38.60 + 43 + 23 + 62 =
  39. 39.41 × 15 =
  40. 40.102 × 4 =

Answer key

  1. 30
  2. 306
  3. 19
  4. 8.6
  5. 229
  6. 275
  7. 209
  8. 399
  9. 54.4
  10. 3600
  11. 255
  12. 8281
  13. 304
  14. 220
  15. 303
  16. 81.1
  17. 7921
  18. 300
  19. 104.9
  20. 269
  21. 83.6
  22. 4500
  23. 19
  24. 12
  25. 98.2
  26. wrong
  27. 189
  28. 98.15
  29. 3100
  30. correct
  31. 276
  32. 378
  33. wrong
  34. 18
  35. 403
  36. 31
  37. 85.25
  38. 188
  39. 615
  40. 408

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