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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 526 · 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. 1.11² =
  2. 2.12² =
  3. 3.18² =
  4. 4.23² =
  5. 5.24² =
  6. 6.14² =
  7. 7.21² =
  8. 8.22² =
  9. 9.17² =
  10. 10.19² =
  11. 11.26² =
  12. 12.25² =
  13. 13.29² =
  14. 14.13² =
  15. 15.16² =
  16. 16.28² =
  17. 17.28² =
  18. 18.15² =
  19. 19.27² =
  20. 20.21² =
  21. 21.28² =
  22. 22.19² =
  23. 23.25² =
  24. 24.11² =
  25. 25.24² =
  26. 26.22² =
  27. 27.28² =
  28. 28.11² =
  29. 29.12² =
  30. 30.23² =
  31. 31.11² =
  32. 32.24² =
  33. 33.17² =
  34. 34.21² =
  35. 35.13² =
  36. 36.29² =
  37. 37.14² =
  38. 38.17² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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