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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 357 · 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. 1.57 + 48 + 33 + 19 =
  2. 2.₹86.20 + ₹33.40 =
  3. 3.378 + 17 =
  4. 4.79² =
  5. 5.19² =
  6. 6.468 − 86 =
  7. 7.17 × 16 =
  8. 8.354 + 69 =
  9. 9.₹32.85 + ₹24.10 =
  10. 10.490 + 88 =
  11. 11.Best estimate of 21 × 68? (a) 140 (b) 2800 (c) 14000 (d) 1400
  12. 12.258 − 39 =
  13. 13.331 + 17 =
  14. 14.335 − 69 =
  15. 15.7 + 1 + 3 + 3 + 3 =
  16. 16.25% of 40 =
  17. 17.20% of 650 =
  18. 18.92 × 5 =
  19. 19.35 × 8 =
  20. 20.₹9.45 + ₹7.95 =
  21. 21.79 × 4 =
  22. 22.21 × 5 =
  23. 23.12 × 8 =
  24. 24.174 + 57 =
  25. 25.73 × 50 =
  26. 26.Check with nines: 88 × 93 = 8189. Correct or wrong? (a) wrong (b) correct
  27. 27.48 × 15 =
  28. 28.Check with nines: 72 × 35 = 2527. Correct or wrong? (a) correct (b) wrong
  29. 29.Check with nines: 69 × 75 = 5175. Correct or wrong? (a) wrong (b) correct
  30. 30.1 + 7 + 8 + 3 =
  31. 31.Best estimate of 202 × 6? (a) 12000 (b) 120 (c) 1200 (d) 2400
  32. 32.63 × 15 =
  33. 33.183 − 79 =
  34. 34.70 − 66 =
  35. 35.₹51.80 + ₹6.10 =
  36. 36.31 × 8 =
  37. 37.60 × 4 =
  38. 38.₹40.85 + ₹33.25 =
  39. 39.516 − 98 =
  40. 40.157 × 4 =

Answer key

  1. 157
  2. 119.6
  3. 395
  4. 6241
  5. 361
  6. 382
  7. 272
  8. 423
  9. 56.95
  10. 578
  11. 1400
  12. 219
  13. 348
  14. 266
  15. 17
  16. 10
  17. 130
  18. 460
  19. 280
  20. 17.4
  21. 316
  22. 105
  23. 96
  24. 231
  25. 3650
  26. wrong
  27. 720
  28. wrong
  29. correct
  30. 19
  31. 1200
  32. 945
  33. 104
  34. 4
  35. 57.9
  36. 248
  37. 240
  38. 74.1
  39. 418
  40. 628

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