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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 836 · 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. 1.29² =
  2. 2.28² =
  3. 3.16² =
  4. 4.18² =
  5. 5.24² =
  6. 6.22² =
  7. 7.13² =
  8. 8.12² =
  9. 9.23² =
  10. 10.19² =
  11. 11.25² =
  12. 12.15² =
  13. 13.17² =
  14. 14.27² =
  15. 15.14² =
  16. 16.21² =
  17. 17.11² =
  18. 18.26² =
  19. 19.24² =
  20. 20.23² =
  21. 21.23² =
  22. 22.14² =
  23. 23.16² =
  24. 24.23² =
  25. 25.29² =
  26. 26.16² =
  27. 27.15² =
  28. 28.13² =
  29. 29.13² =
  30. 30.23² =
  31. 31.26² =
  32. 32.23² =
  33. 33.12² =
  34. 34.28² =
  35. 35.22² =
  36. 36.29² =
  37. 37.16² =
  38. 38.28² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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