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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 227 · 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. 1.12² =
  2. 2.19² =
  3. 3.14² =
  4. 4.15² =
  5. 5.25² =
  6. 6.21² =
  7. 7.29² =
  8. 8.22² =
  9. 9.18² =
  10. 10.28² =
  11. 11.24² =
  12. 12.26² =
  13. 13.11² =
  14. 14.16² =
  15. 15.17² =
  16. 16.13² =
  17. 17.16² =
  18. 18.27² =
  19. 19.11² =
  20. 20.23² =
  21. 21.17² =
  22. 22.14² =
  23. 23.27² =
  24. 24.19² =
  25. 25.27² =
  26. 26.25² =
  27. 27.24² =
  28. 28.14² =
  29. 29.13² =
  30. 30.24² =
  31. 31.17² =
  32. 32.14² =
  33. 33.21² =
  34. 34.12² =
  35. 35.28² =
  36. 36.23² =
  37. 37.25² =
  38. 38.16² =
  39. 39.21² =
  40. 40.15² =

Answer key

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

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