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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 575 · 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. 2.21² =
  3. 3.15² =
  4. 4.28² =
  5. 5.25² =
  6. 6.13² =
  7. 7.17² =
  8. 8.16² =
  9. 9.24² =
  10. 10.27² =
  11. 11.11² =
  12. 12.29² =
  13. 13.22² =
  14. 14.19² =
  15. 15.12² =
  16. 16.21² =
  17. 17.23² =
  18. 18.26² =
  19. 19.14² =
  20. 20.11² =
  21. 21.29² =
  22. 22.17² =
  23. 23.24² =
  24. 24.27² =
  25. 25.24² =
  26. 26.26² =
  27. 27.21² =
  28. 28.18² =
  29. 29.11² =
  30. 30.12² =
  31. 31.21² =
  32. 32.26² =
  33. 33.24² =
  34. 34.11² =
  35. 35.27² =
  36. 36.13² =
  37. 37.17² =
  38. 38.25² =
  39. 39.16² =
  40. 40.11² =

Answer key

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

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