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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 11 · 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. 2.12² =
  3. 3.27² =
  4. 4.23² =
  5. 5.13² =
  6. 6.17² =
  7. 7.24² =
  8. 8.15² =
  9. 9.19² =
  10. 10.25² =
  11. 11.18² =
  12. 12.28² =
  13. 13.26² =
  14. 14.29² =
  15. 15.16² =
  16. 16.22² =
  17. 17.14² =
  18. 18.23² =
  19. 19.21² =
  20. 20.13² =
  21. 21.25² =
  22. 22.11² =
  23. 23.15² =
  24. 24.28² =
  25. 25.11² =
  26. 26.27² =
  27. 27.13² =
  28. 28.16² =
  29. 29.12² =
  30. 30.29² =
  31. 31.26² =
  32. 32.17² =
  33. 33.21² =
  34. 34.26² =
  35. 35.21² =
  36. 36.24² =
  37. 37.22² =
  38. 38.14² =
  39. 39.23² =
  40. 40.24² =

Answer key

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

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