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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 441 · 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. 2.29² =
  3. 3.19² =
  4. 4.13² =
  5. 5.17² =
  6. 6.26² =
  7. 7.25² =
  8. 8.12² =
  9. 9.23² =
  10. 10.11² =
  11. 11.24² =
  12. 12.18² =
  13. 13.14² =
  14. 14.27² =
  15. 15.15² =
  16. 16.27² =
  17. 17.19² =
  18. 18.16² =
  19. 19.22² =
  20. 20.14² =
  21. 21.28² =
  22. 22.21² =
  23. 23.13² =
  24. 24.21² =
  25. 25.29² =
  26. 26.15² =
  27. 27.14² =
  28. 28.25² =
  29. 29.17² =
  30. 30.23² =
  31. 31.26² =
  32. 32.25² =
  33. 33.28² =
  34. 34.23² =
  35. 35.21² =
  36. 36.24² =
  37. 37.13² =
  38. 38.29² =
  39. 39.14² =
  40. 40.16² =

Answer key

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

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