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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 672 · 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. 2.13² =
  3. 3.12² =
  4. 4.15² =
  5. 5.29² =
  6. 6.21² =
  7. 7.17² =
  8. 8.18² =
  9. 9.14² =
  10. 10.26² =
  11. 11.25² =
  12. 12.16² =
  13. 13.19² =
  14. 14.27² =
  15. 15.23² =
  16. 16.24² =
  17. 17.12² =
  18. 18.22² =
  19. 19.28² =
  20. 20.11² =
  21. 21.12² =
  22. 22.24² =
  23. 23.27² =
  24. 24.29² =
  25. 25.22² =
  26. 26.14² =
  27. 27.21² =
  28. 28.14² =
  29. 29.16² =
  30. 30.22² =
  31. 31.18² =
  32. 32.14² =
  33. 33.15² =
  34. 34.21² =
  35. 35.15² =
  36. 36.11² =
  37. 37.21² =
  38. 38.16² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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