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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 132 · 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. 1.19² =
  2. 2.28² =
  3. 3.22² =
  4. 4.23² =
  5. 5.13² =
  6. 6.25² =
  7. 7.18² =
  8. 8.29² =
  9. 9.17² =
  10. 10.11² =
  11. 11.12² =
  12. 12.21² =
  13. 13.15² =
  14. 14.27² =
  15. 15.24² =
  16. 16.18² =
  17. 17.16² =
  18. 18.17² =
  19. 19.26² =
  20. 20.21² =
  21. 21.14² =
  22. 22.29² =
  23. 23.21² =
  24. 24.23² =
  25. 25.29² =
  26. 26.21² =
  27. 27.22² =
  28. 28.14² =
  29. 29.16² =
  30. 30.25² =
  31. 31.19² =
  32. 32.17² =
  33. 33.21² =
  34. 34.21² =
  35. 35.17² =
  36. 36.23² =
  37. 37.12² =
  38. 38.21² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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