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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 708 · 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. 1.13² =
  2. 2.23² =
  3. 3.15² =
  4. 4.21² =
  5. 5.11² =
  6. 6.17² =
  7. 7.12² =
  8. 8.14² =
  9. 9.26² =
  10. 10.29² =
  11. 11.24² =
  12. 12.27² =
  13. 13.16² =
  14. 14.19² =
  15. 15.25² =
  16. 16.18² =
  17. 17.22² =
  18. 18.21² =
  19. 19.28² =
  20. 20.12² =
  21. 21.21² =
  22. 22.25² =
  23. 23.11² =
  24. 24.25² =
  25. 25.11² =
  26. 26.28² =
  27. 27.22² =
  28. 28.21² =
  29. 29.15² =
  30. 30.21² =
  31. 31.25² =
  32. 32.27² =
  33. 33.23² =
  34. 34.12² =
  35. 35.25² =
  36. 36.13² =
  37. 37.21² =
  38. 38.19² =
  39. 39.15² =
  40. 40.28² =

Answer key

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

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