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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 695 · 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. 2.28² =
  3. 3.13² =
  4. 4.29² =
  5. 5.25² =
  6. 6.21² =
  7. 7.15² =
  8. 8.16² =
  9. 9.22² =
  10. 10.19² =
  11. 11.27² =
  12. 12.12² =
  13. 13.17² =
  14. 14.23² =
  15. 15.26² =
  16. 16.24² =
  17. 17.18² =
  18. 18.14² =
  19. 19.21² =
  20. 20.25² =
  21. 21.17² =
  22. 22.19² =
  23. 23.23² =
  24. 24.16² =
  25. 25.16² =
  26. 26.16² =
  27. 27.21² =
  28. 28.26² =
  29. 29.23² =
  30. 30.22² =
  31. 31.17² =
  32. 32.21² =
  33. 33.11² =
  34. 34.23² =
  35. 35.19² =
  36. 36.28² =
  37. 37.17² =
  38. 38.23² =
  39. 39.15² =
  40. 40.16² =

Answer key

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

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