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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 153 · 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. 1.41 + 19 + 67 + 53 =
  2. 2.44 × 50 =
  3. 3.473 + 49 =
  4. 4.453 + 97 =
  5. 5.550 ÷ 5 =
  6. 6.Best estimate of 48 × 22? (a) 10000 (b) 1000 (c) 100 (d) 2000
  7. 7.124 + 19 =
  8. 8.9 + 3 + 7 + 1 =
  9. 9.41 × 50 =
  10. 10.Best estimate of 197 × 3? (a) 6000 (b) 600 (c) 1200 (d) 60
  11. 11.60 × 4 =
  12. 12.29² =
  13. 13.65 × 5 =
  14. 14.6 × 15 =
  15. 15.161 − 27 =
  16. 16.51 × 8 =
  17. 17.9 + 9 + 1 + 4 =
  18. 18.208 + 28 =
  19. 19.419 + 28 =
  20. 20.4 + 1 + 9 + 5 + 1 =
  21. 21.175 ÷ 25 =
  22. 22.89² =
  23. 23.15 × 13 =
  24. 24.Best estimate of 202 × 3? (a) 1200 (b) 60 (c) 600 (d) 6000
  25. 25.146 − 98 =
  26. 26.15 × 15 =
  27. 27.315 − 76 =
  28. 28.97 × 50 =
  29. 29.Check with nines: 23 × 42 = 966. Correct or wrong? (a) wrong (b) correct
  30. 30.47 × 15 =
  31. 31.442 + 39 =
  32. 32.56 + 55 + 55 + 55 =
  33. 33.19² =
  34. 34.69² =
  35. 35.Best estimate of 397 × 9? (a) 36000 (b) 360 (c) 7200 (d) 3600
  36. 36.905 ÷ 5 =
  37. 37.18 × 15 =
  38. 38.₹89.55 + ₹15.65 =
  39. 39.424 − 19 =
  40. 40.48 + 70 + 33 + 70 =

Answer key

  1. 180
  2. 2200
  3. 522
  4. 550
  5. 110
  6. 1000
  7. 143
  8. 20
  9. 2050
  10. 600
  11. 240
  12. 841
  13. 325
  14. 90
  15. 134
  16. 408
  17. 23
  18. 236
  19. 447
  20. 20
  21. 7
  22. 7921
  23. 195
  24. 600
  25. 48
  26. 225
  27. 239
  28. 4850
  29. correct
  30. 705
  31. 481
  32. 221
  33. 361
  34. 4761
  35. 3600
  36. 181
  37. 270
  38. 105.2
  39. 405
  40. 221

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