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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 800 · 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. 1.25² =
  2. 2.13² =
  3. 3.12² =
  4. 4.24² =
  5. 5.16² =
  6. 6.21² =
  7. 7.23² =
  8. 8.29² =
  9. 9.14² =
  10. 10.17² =
  11. 11.19² =
  12. 12.11² =
  13. 13.28² =
  14. 14.22² =
  15. 15.18² =
  16. 16.12² =
  17. 17.15² =
  18. 18.27² =
  19. 19.17² =
  20. 20.11² =
  21. 21.26² =
  22. 22.24² =
  23. 23.24² =
  24. 24.14² =
  25. 25.13² =
  26. 26.12² =
  27. 27.14² =
  28. 28.13² =
  29. 29.24² =
  30. 30.21² =
  31. 31.28² =
  32. 32.12² =
  33. 33.18² =
  34. 34.28² =
  35. 35.15² =
  36. 36.14² =
  37. 37.21² =
  38. 38.13² =
  39. 39.22² =
  40. 40.29² =

Answer key

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

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