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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 220 · 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. 1.163 − 76 =
  2. 2.71 + 98 =
  3. 3.11 + 22 + 87 + 18 =
  4. 4.479 + 48 =
  5. 5.420 + 37 =
  6. 6.Best estimate of 99 × 8? (a) 80 (b) 800 (c) 8000 (d) 1600
  7. 7.260 + 58 =
  8. 8.136 − 46 =
  9. 9.329 − 57 =
  10. 10.₹62.60 − ₹29.05 =
  11. 11.Best estimate of 42 × 29? (a) 2400 (b) 120 (c) 12000 (d) 1200
  12. 12.17 × 8 =
  13. 13.86 + 83 + 43 + 74 =
  14. 14.329 + 27 =
  15. 15.63 × 8 =
  16. 16.41 × 15 =
  17. 17.128 × 4 =
  18. 18.40 × 8 =
  19. 19.15 × 16 =
  20. 20.5 + 8 + 6 + 4 + 1 =
  21. 21.Best estimate of 51 × 19? (a) 2000 (b) 100 (c) 1000 (d) 10000
  22. 22.17 × 13 =
  23. 23.84 + 51 + 51 + 69 =
  24. 24.1125 ÷ 25 =
  25. 25.78 + 58 + 16 + 76 =
  26. 26.16 × 14 =
  27. 27.592 − 99 =
  28. 28.Check with nines: 41 × 84 = 3438. Correct or wrong? (a) correct (b) wrong
  29. 29.2 + 7 + 2 + 3 =
  30. 30.17 + 17 + 43 + 19 =
  31. 31.58 − 16 =
  32. 32.1325 ÷ 25 =
  33. 33.91 × 5 =
  34. 34.209 − 28 =
  35. 35.Check with nines: 408 + 674 = 1077. Correct or wrong? (a) wrong (b) correct
  36. 36.13 × 15 =
  37. 37.28 × 8 =
  38. 38.850 ÷ 25 =
  39. 39.925 ÷ 25 =
  40. 40.11 × 12 =

Answer key

  1. 87
  2. 169
  3. 138
  4. 527
  5. 457
  6. 800
  7. 318
  8. 90
  9. 272
  10. 33.55
  11. 1200
  12. 136
  13. 286
  14. 356
  15. 504
  16. 615
  17. 512
  18. 320
  19. 240
  20. 24
  21. 1000
  22. 221
  23. 255
  24. 45
  25. 228
  26. 224
  27. 493
  28. wrong
  29. 14
  30. 96
  31. 42
  32. 53
  33. 455
  34. 181
  35. wrong
  36. 195
  37. 224
  38. 34
  39. 37
  40. 132

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