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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 874 · 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. 2.22² =
  3. 3.21² =
  4. 4.13² =
  5. 5.12² =
  6. 6.29² =
  7. 7.24² =
  8. 8.14² =
  9. 9.25² =
  10. 10.11² =
  11. 11.15² =
  12. 12.28² =
  13. 13.23² =
  14. 14.19² =
  15. 15.27² =
  16. 16.17² =
  17. 17.18² =
  18. 18.26² =
  19. 19.21² =
  20. 20.13² =
  21. 21.15² =
  22. 22.19² =
  23. 23.13² =
  24. 24.28² =
  25. 25.24² =
  26. 26.13² =
  27. 27.18² =
  28. 28.23² =
  29. 29.29² =
  30. 30.19² =
  31. 31.18² =
  32. 32.15² =
  33. 33.18² =
  34. 34.17² =
  35. 35.14² =
  36. 36.23² =
  37. 37.13² =
  38. 38.15² =
  39. 39.28² =
  40. 40.17² =

Answer key

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

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