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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 557 · 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. 2.14² =
  3. 3.23² =
  4. 4.19² =
  5. 5.24² =
  6. 6.17² =
  7. 7.28² =
  8. 8.29² =
  9. 9.26² =
  10. 10.15² =
  11. 11.22² =
  12. 12.13² =
  13. 13.24² =
  14. 14.12² =
  15. 15.25² =
  16. 16.27² =
  17. 17.16² =
  18. 18.11² =
  19. 19.18² =
  20. 20.11² =
  21. 21.16² =
  22. 22.11² =
  23. 23.17² =
  24. 24.13² =
  25. 25.26² =
  26. 26.13² =
  27. 27.11² =
  28. 28.17² =
  29. 29.18² =
  30. 30.15² =
  31. 31.13² =
  32. 32.24² =
  33. 33.25² =
  34. 34.14² =
  35. 35.15² =
  36. 36.25² =
  37. 37.25² =
  38. 38.28² =
  39. 39.19² =
  40. 40.24² =

Answer key

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

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