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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 921 · 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. 1.12 × 15 =
  2. 2.51 + 89 =
  3. 3.164 − 68 =
  4. 4.14 × 16 =
  5. 5.210 + 28 =
  6. 6.Check with nines: 17 × 60 = 1020. Correct or wrong? (a) correct (b) wrong
  7. 7.465 − 26 =
  8. 8.195 ÷ 5 =
  9. 9.42 + 46 + 75 + 47 =
  10. 10.92 × 4 =
  11. 11.20 × 8 =
  12. 12.16 × 50 =
  13. 13.21² =
  14. 14.Best estimate of 299 × 4? (a) 2400 (b) 1200 (c) 120 (d) 12000
  15. 15.81² =
  16. 16.375 ÷ 25 =
  17. 17.375 + 47 =
  18. 18.14 × 15 =
  19. 19.455 − 96 =
  20. 20.36 × 15 =
  21. 21.₹27.50 − ₹15.30 =
  22. 22.50 × 5 =
  23. 23.1% of 160 =
  24. 24.Best estimate of 58 × 42? (a) 2400 (b) 4800 (c) 240 (d) 24000
  25. 25.257 + 19 =
  26. 26.530 − 68 =
  27. 27.21² =
  28. 28.27 × 8 =
  29. 29.11 × 19 =
  30. 30.₹80.05 + ₹11.55 =
  31. 31.₹60.25 − ₹6.05 =
  32. 32.925 ÷ 5 =
  33. 33.57 × 15 =
  34. 34.Check with nines: 772 + 443 = 1216. Correct or wrong? (a) correct (b) wrong
  35. 35.79² =
  36. 36.18 × 5 =
  37. 37.57 × 8 =
  38. 38.165 + 97 =
  39. 39.142 − 38 =
  40. 40.410 + 79 =

Answer key

  1. 180
  2. 140
  3. 96
  4. 224
  5. 238
  6. correct
  7. 439
  8. 39
  9. 210
  10. 368
  11. 160
  12. 800
  13. 441
  14. 1200
  15. 6561
  16. 15
  17. 422
  18. 210
  19. 359
  20. 540
  21. 12.2
  22. 250
  23. 1.6
  24. 2400
  25. 276
  26. 462
  27. 441
  28. 216
  29. 209
  30. 91.6
  31. 54.2
  32. 185
  33. 855
  34. wrong
  35. 6241
  36. 90
  37. 456
  38. 262
  39. 104
  40. 489

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