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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 162 · 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. 2.16² =
  3. 3.23² =
  4. 4.13² =
  5. 5.27² =
  6. 6.21² =
  7. 7.24² =
  8. 8.11² =
  9. 9.15² =
  10. 10.22² =
  11. 11.12² =
  12. 12.26² =
  13. 13.28² =
  14. 14.18² =
  15. 15.19² =
  16. 16.14² =
  17. 17.25² =
  18. 18.13² =
  19. 19.14² =
  20. 20.29² =
  21. 21.15² =
  22. 22.17² =
  23. 23.12² =
  24. 24.27² =
  25. 25.19² =
  26. 26.11² =
  27. 27.25² =
  28. 28.19² =
  29. 29.17² =
  30. 30.25² =
  31. 31.18² =
  32. 32.23² =
  33. 33.29² =
  34. 34.24² =
  35. 35.13² =
  36. 36.16² =
  37. 37.13² =
  38. 38.25² =
  39. 39.29² =
  40. 40.29² =

Answer key

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

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