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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 321 · 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. 1.26² =
  2. 2.22² =
  3. 3.29² =
  4. 4.19² =
  5. 5.13² =
  6. 6.14² =
  7. 7.21² =
  8. 8.24² =
  9. 9.27² =
  10. 10.11² =
  11. 11.12² =
  12. 12.17² =
  13. 13.15² =
  14. 14.23² =
  15. 15.28² =
  16. 16.16² =
  17. 17.18² =
  18. 18.25² =
  19. 19.29² =
  20. 20.23² =
  21. 21.13² =
  22. 22.29² =
  23. 23.21² =
  24. 24.21² =
  25. 25.25² =
  26. 26.22² =
  27. 27.25² =
  28. 28.21² =
  29. 29.25² =
  30. 30.18² =
  31. 31.27² =
  32. 32.23² =
  33. 33.15² =
  34. 34.21² =
  35. 35.13² =
  36. 36.11² =
  37. 37.15² =
  38. 38.21² =
  39. 39.29² =
  40. 40.24² =

Answer key

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

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