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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 554 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.12² =
  2. 2.11² =
  3. 3.28² =
  4. 4.19² =
  5. 5.23² =
  6. 6.27² =
  7. 7.13² =
  8. 8.22² =
  9. 9.14² =
  10. 10.26² =
  11. 11.15² =
  12. 12.24² =
  13. 13.17² =
  14. 14.18² =
  15. 15.29² =
  16. 16.16² =
  17. 17.21² =
  18. 18.25² =
  19. 19.26² =
  20. 20.21² =
  21. 21.26² =
  22. 22.25² =
  23. 23.24² =
  24. 24.17² =
  25. 25.15² =
  26. 26.28² =
  27. 27.18² =
  28. 28.12² =
  29. 29.17² =
  30. 30.29² =
  31. 31.15² =
  32. 32.21² =
  33. 33.18² =
  34. 34.28² =
  35. 35.27² =
  36. 36.25² =
  37. 37.21² =
  38. 38.15² =
  39. 39.17² =
  40. 40.14² =

Answer key

  1. 144
  2. 121
  3. 784
  4. 361
  5. 529
  6. 729
  7. 169
  8. 484
  9. 196
  10. 676
  11. 225
  12. 576
  13. 289
  14. 324
  15. 841
  16. 256
  17. 441
  18. 625
  19. 676
  20. 441
  21. 676
  22. 625
  23. 576
  24. 289
  25. 225
  26. 784
  27. 324
  28. 144
  29. 289
  30. 841
  31. 225
  32. 441
  33. 324
  34. 784
  35. 729
  36. 625
  37. 441
  38. 225
  39. 289
  40. 196

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