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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 780 · 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. 2.16² =
  3. 3.11² =
  4. 4.15² =
  5. 5.21² =
  6. 6.12² =
  7. 7.26² =
  8. 8.14² =
  9. 9.23² =
  10. 10.29² =
  11. 11.17² =
  12. 12.25² =
  13. 13.28² =
  14. 14.13² =
  15. 15.22² =
  16. 16.27² =
  17. 17.24² =
  18. 18.28² =
  19. 19.18² =
  20. 20.19² =
  21. 21.21² =
  22. 22.26² =
  23. 23.13² =
  24. 24.19² =
  25. 25.13² =
  26. 26.24² =
  27. 27.24² =
  28. 28.23² =
  29. 29.15² =
  30. 30.11² =
  31. 31.14² =
  32. 32.15² =
  33. 33.26² =
  34. 34.19² =
  35. 35.21² =
  36. 36.13² =
  37. 37.27² =
  38. 38.22² =
  39. 39.21² =
  40. 40.19² =

Answer key

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

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