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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 861 · 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. 3.12² =
  4. 4.11² =
  5. 5.16² =
  6. 6.29² =
  7. 7.14² =
  8. 8.25² =
  9. 9.19² =
  10. 10.17² =
  11. 11.24² =
  12. 12.15² =
  13. 13.26² =
  14. 14.21² =
  15. 15.28² =
  16. 16.22² =
  17. 17.12² =
  18. 18.28² =
  19. 19.26² =
  20. 20.27² =
  21. 21.24² =
  22. 22.18² =
  23. 23.13² =
  24. 24.15² =
  25. 25.15² =
  26. 26.22² =
  27. 27.16² =
  28. 28.23² =
  29. 29.13² =
  30. 30.13² =
  31. 31.16² =
  32. 32.16² =
  33. 33.25² =
  34. 34.13² =
  35. 35.23² =
  36. 36.22² =
  37. 37.28² =
  38. 38.17² =
  39. 39.12² =
  40. 40.17² =

Answer key

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

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