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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 887 · 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. 1.24² =
  2. 2.14² =
  3. 3.19² =
  4. 4.15² =
  5. 5.13² =
  6. 6.27² =
  7. 7.21² =
  8. 8.29² =
  9. 9.12² =
  10. 10.11² =
  11. 11.22² =
  12. 12.25² =
  13. 13.23² =
  14. 14.28² =
  15. 15.17² =
  16. 16.18² =
  17. 17.27² =
  18. 18.16² =
  19. 19.26² =
  20. 20.18² =
  21. 21.11² =
  22. 22.15² =
  23. 23.21² =
  24. 24.25² =
  25. 25.28² =
  26. 26.21² =
  27. 27.13² =
  28. 28.11² =
  29. 29.15² =
  30. 30.24² =
  31. 31.12² =
  32. 32.12² =
  33. 33.13² =
  34. 34.16² =
  35. 35.21² =
  36. 36.19² =
  37. 37.15² =
  38. 38.14² =
  39. 39.11² =
  40. 40.22² =

Answer key

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

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