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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 772 · 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. 1.15² =
  2. 2.25² =
  3. 3.22² =
  4. 4.11² =
  5. 5.23² =
  6. 6.27² =
  7. 7.18² =
  8. 8.24² =
  9. 9.16² =
  10. 10.29² =
  11. 11.26² =
  12. 12.17² =
  13. 13.12² =
  14. 14.13² =
  15. 15.14² =
  16. 16.19² =
  17. 17.28² =
  18. 18.14² =
  19. 19.21² =
  20. 20.24² =
  21. 21.12² =
  22. 22.23² =
  23. 23.28² =
  24. 24.28² =
  25. 25.18² =
  26. 26.11² =
  27. 27.19² =
  28. 28.27² =
  29. 29.27² =
  30. 30.15² =
  31. 31.18² =
  32. 32.27² =
  33. 33.13² =
  34. 34.24² =
  35. 35.12² =
  36. 36.24² =
  37. 37.11² =
  38. 38.21² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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