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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 668 · 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. 2.14² =
  3. 3.22² =
  4. 4.21² =
  5. 5.25² =
  6. 6.16² =
  7. 7.23² =
  8. 8.28² =
  9. 9.27² =
  10. 10.11² =
  11. 11.17² =
  12. 12.29² =
  13. 13.26² =
  14. 14.16² =
  15. 15.15² =
  16. 16.13² =
  17. 17.18² =
  18. 18.24² =
  19. 19.19² =
  20. 20.15² =
  21. 21.15² =
  22. 22.21² =
  23. 23.21² =
  24. 24.11² =
  25. 25.23² =
  26. 26.27² =
  27. 27.19² =
  28. 28.13² =
  29. 29.26² =
  30. 30.24² =
  31. 31.24² =
  32. 32.19² =
  33. 33.16² =
  34. 34.23² =
  35. 35.14² =
  36. 36.28² =
  37. 37.19² =
  38. 38.12² =
  39. 39.13² =
  40. 40.14² =

Answer key

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

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