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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 313 · 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. 1.26² =
  2. 2.12² =
  3. 3.17² =
  4. 4.13² =
  5. 5.25² =
  6. 6.15² =
  7. 7.29² =
  8. 8.23² =
  9. 9.27² =
  10. 10.28² =
  11. 11.16² =
  12. 12.21² =
  13. 13.24² =
  14. 14.11² =
  15. 15.19² =
  16. 16.18² =
  17. 17.14² =
  18. 18.12² =
  19. 19.28² =
  20. 20.11² =
  21. 21.22² =
  22. 22.18² =
  23. 23.29² =
  24. 24.21² =
  25. 25.15² =
  26. 26.14² =
  27. 27.19² =
  28. 28.12² =
  29. 29.13² =
  30. 30.19² =
  31. 31.14² =
  32. 32.21² =
  33. 33.24² =
  34. 34.25² =
  35. 35.11² =
  36. 36.15² =
  37. 37.28² =
  38. 38.29² =
  39. 39.15² =
  40. 40.21² =

Answer key

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

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