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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 7 · 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. 2.15² =
  3. 3.25² =
  4. 4.29² =
  5. 5.24² =
  6. 6.22² =
  7. 7.17² =
  8. 8.26² =
  9. 9.12² =
  10. 10.19² =
  11. 11.18² =
  12. 12.21² =
  13. 13.14² =
  14. 14.23² =
  15. 15.13² =
  16. 16.27² =
  17. 17.16² =
  18. 18.28² =
  19. 19.11² =
  20. 20.14² =
  21. 21.21² =
  22. 22.19² =
  23. 23.19² =
  24. 24.21² =
  25. 25.25² =
  26. 26.11² =
  27. 27.26² =
  28. 28.11² =
  29. 29.18² =
  30. 30.18² =
  31. 31.11² =
  32. 32.18² =
  33. 33.24² =
  34. 34.23² =
  35. 35.17² =
  36. 36.16² =
  37. 37.11² =
  38. 38.28² =
  39. 39.21² =
  40. 40.16² =

Answer key

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

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