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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 631 · 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. 1.18² =
  2. 2.11² =
  3. 3.26² =
  4. 4.13² =
  5. 5.15² =
  6. 6.29² =
  7. 7.17² =
  8. 8.16² =
  9. 9.28² =
  10. 10.25² =
  11. 11.14² =
  12. 12.24² =
  13. 13.19² =
  14. 14.21² =
  15. 15.12² =
  16. 16.22² =
  17. 17.12² =
  18. 18.13² =
  19. 19.27² =
  20. 20.16² =
  21. 21.12² =
  22. 22.23² =
  23. 23.18² =
  24. 24.15² =
  25. 25.22² =
  26. 26.15² =
  27. 27.21² =
  28. 28.16² =
  29. 29.28² =
  30. 30.22² =
  31. 31.12² =
  32. 32.22² =
  33. 33.19² =
  34. 34.23² =
  35. 35.21² =
  36. 36.13² =
  37. 37.29² =
  38. 38.22² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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