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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 270 · 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. 1.25² =
  2. 2.24² =
  3. 3.16² =
  4. 4.15² =
  5. 5.12² =
  6. 6.17² =
  7. 7.14² =
  8. 8.29² =
  9. 9.11² =
  10. 10.19² =
  11. 11.13² =
  12. 12.21² =
  13. 13.23² =
  14. 14.22² =
  15. 15.18² =
  16. 16.26² =
  17. 17.12² =
  18. 18.25² =
  19. 19.13² =
  20. 20.27² =
  21. 21.21² =
  22. 22.11² =
  23. 23.21² =
  24. 24.28² =
  25. 25.22² =
  26. 26.25² =
  27. 27.11² =
  28. 28.21² =
  29. 29.15² =
  30. 30.18² =
  31. 31.27² =
  32. 32.22² =
  33. 33.23² =
  34. 34.21² =
  35. 35.11² =
  36. 36.13² =
  37. 37.13² =
  38. 38.21² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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