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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 76 · 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. 1.22² =
  2. 2.11² =
  3. 3.16² =
  4. 4.21² =
  5. 5.23² =
  6. 6.14² =
  7. 7.26² =
  8. 8.24² =
  9. 9.15² =
  10. 10.28² =
  11. 11.29² =
  12. 12.19² =
  13. 13.27² =
  14. 14.17² =
  15. 15.13² =
  16. 16.12² =
  17. 17.27² =
  18. 18.18² =
  19. 19.25² =
  20. 20.26² =
  21. 21.16² =
  22. 22.13² =
  23. 23.25² =
  24. 24.13² =
  25. 25.18² =
  26. 26.15² =
  27. 27.17² =
  28. 28.11² =
  29. 29.12² =
  30. 30.16² =
  31. 31.22² =
  32. 32.12² =
  33. 33.23² =
  34. 34.21² =
  35. 35.21² =
  36. 36.24² =
  37. 37.23² =
  38. 38.11² =
  39. 39.25² =
  40. 40.17² =

Answer key

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

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