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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 555 · 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. 1.21² =
  2. 2.16² =
  3. 3.15² =
  4. 4.12² =
  5. 5.27² =
  6. 6.14² =
  7. 7.17² =
  8. 8.23² =
  9. 9.28² =
  10. 10.22² =
  11. 11.13² =
  12. 12.18² =
  13. 13.11² =
  14. 14.29² =
  15. 15.25² =
  16. 16.26² =
  17. 17.19² =
  18. 18.17² =
  19. 19.24² =
  20. 20.16² =
  21. 21.12² =
  22. 22.22² =
  23. 23.17² =
  24. 24.12² =
  25. 25.22² =
  26. 26.14² =
  27. 27.15² =
  28. 28.12² =
  29. 29.17² =
  30. 30.14² =
  31. 31.12² =
  32. 32.14² =
  33. 33.13² =
  34. 34.23² =
  35. 35.13² =
  36. 36.16² =
  37. 37.21² =
  38. 38.16² =
  39. 39.11² =
  40. 40.12² =

Answer key

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

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