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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 279 · 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. 1.18² =
  2. 2.22² =
  3. 3.11² =
  4. 4.19² =
  5. 5.17² =
  6. 6.23² =
  7. 7.24² =
  8. 8.15² =
  9. 9.13² =
  10. 10.16² =
  11. 11.27² =
  12. 12.21² =
  13. 13.26² =
  14. 14.14² =
  15. 15.14² =
  16. 16.28² =
  17. 17.29² =
  18. 18.25² =
  19. 19.11² =
  20. 20.15² =
  21. 21.23² =
  22. 22.12² =
  23. 23.27² =
  24. 24.21² =
  25. 25.13² =
  26. 26.14² =
  27. 27.21² =
  28. 28.19² =
  29. 29.14² =
  30. 30.18² =
  31. 31.18² =
  32. 32.21² =
  33. 33.26² =
  34. 34.16² =
  35. 35.17² =
  36. 36.19² =
  37. 37.28² =
  38. 38.11² =
  39. 39.16² =
  40. 40.12² =

Answer key

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

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