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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 220 · 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. 2.22² =
  3. 3.14² =
  4. 4.13² =
  5. 5.29² =
  6. 6.24² =
  7. 7.15² =
  8. 8.26² =
  9. 9.21² =
  10. 10.28² =
  11. 11.18² =
  12. 12.25² =
  13. 13.19² =
  14. 14.17² =
  15. 15.16² =
  16. 16.11² =
  17. 17.23² =
  18. 18.27² =
  19. 19.15² =
  20. 20.11² =
  21. 21.23² =
  22. 22.19² =
  23. 23.19² =
  24. 24.12² =
  25. 25.28² =
  26. 26.15² =
  27. 27.24² =
  28. 28.21² =
  29. 29.22² =
  30. 30.28² =
  31. 31.17² =
  32. 32.16² =
  33. 33.28² =
  34. 34.17² =
  35. 35.19² =
  36. 36.14² =
  37. 37.12² =
  38. 38.21² =
  39. 39.21² =
  40. 40.29² =

Answer key

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

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