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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 626 · 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. 1.22² =
  2. 2.29² =
  3. 3.21² =
  4. 4.17² =
  5. 5.18² =
  6. 6.11² =
  7. 7.13² =
  8. 8.16² =
  9. 9.23² =
  10. 10.26² =
  11. 11.24² =
  12. 12.12² =
  13. 13.19² =
  14. 14.28² =
  15. 15.14² =
  16. 16.27² =
  17. 17.15² =
  18. 18.25² =
  19. 19.19² =
  20. 20.25² =
  21. 21.24² =
  22. 22.25² =
  23. 23.29² =
  24. 24.29² =
  25. 25.14² =
  26. 26.21² =
  27. 27.23² =
  28. 28.26² =
  29. 29.21² =
  30. 30.13² =
  31. 31.12² =
  32. 32.28² =
  33. 33.23² =
  34. 34.16² =
  35. 35.11² =
  36. 36.15² =
  37. 37.15² =
  38. 38.26² =
  39. 39.19² =
  40. 40.15² =

Answer key

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

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