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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 803 · 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. 1.16² =
  2. 2.26² =
  3. 3.14² =
  4. 4.21² =
  5. 5.27² =
  6. 6.15² =
  7. 7.11² =
  8. 8.18² =
  9. 9.25² =
  10. 10.13² =
  11. 11.22² =
  12. 12.23² =
  13. 13.15² =
  14. 14.19² =
  15. 15.28² =
  16. 16.12² =
  17. 17.24² =
  18. 18.25² =
  19. 19.17² =
  20. 20.29² =
  21. 21.18² =
  22. 22.15² =
  23. 23.12² =
  24. 24.23² =
  25. 25.14² =
  26. 26.17² =
  27. 27.27² =
  28. 28.26² =
  29. 29.16² =
  30. 30.19² =
  31. 31.29² =
  32. 32.25² =
  33. 33.24² =
  34. 34.11² =
  35. 35.12² =
  36. 36.12² =
  37. 37.17² =
  38. 38.13² =
  39. 39.14² =
  40. 40.29² =

Answer key

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

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