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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 738 · 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. 1.23² =
  2. 2.26² =
  3. 3.16² =
  4. 4.28² =
  5. 5.11² =
  6. 6.18² =
  7. 7.17² =
  8. 8.14² =
  9. 9.13² =
  10. 10.27² =
  11. 11.15² =
  12. 12.12² =
  13. 13.24² =
  14. 14.21² =
  15. 15.29² =
  16. 16.12² =
  17. 17.19² =
  18. 18.22² =
  19. 19.15² =
  20. 20.25² =
  21. 21.22² =
  22. 22.13² =
  23. 23.29² =
  24. 24.12² =
  25. 25.15² =
  26. 26.25² =
  27. 27.26² =
  28. 28.19² =
  29. 29.24² =
  30. 30.17² =
  31. 31.12² =
  32. 32.14² =
  33. 33.12² =
  34. 34.21² =
  35. 35.27² =
  36. 36.23² =
  37. 37.21² =
  38. 38.14² =
  39. 39.24² =
  40. 40.23² =

Answer key

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

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