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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 67 · 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. 1.28² =
  2. 2.21² =
  3. 3.12² =
  4. 4.25² =
  5. 5.23² =
  6. 6.15² =
  7. 7.11² =
  8. 8.26² =
  9. 9.27² =
  10. 10.17² =
  11. 11.16² =
  12. 12.14² =
  13. 13.13² =
  14. 14.18² =
  15. 15.24² =
  16. 16.19² =
  17. 17.29² =
  18. 18.22² =
  19. 19.13² =
  20. 20.26² =
  21. 21.22² =
  22. 22.17² =
  23. 23.21² =
  24. 24.24² =
  25. 25.21² =
  26. 26.15² =
  27. 27.24² =
  28. 28.28² =
  29. 29.12² =
  30. 30.28² =
  31. 31.11² =
  32. 32.21² =
  33. 33.25² =
  34. 34.25² =
  35. 35.16² =
  36. 36.13² =
  37. 37.28² =
  38. 38.25² =
  39. 39.14² =
  40. 40.29² =

Answer key

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

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