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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 22 · 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. 1.29² =
  2. 2.15² =
  3. 3.13² =
  4. 4.21² =
  5. 5.27² =
  6. 6.11² =
  7. 7.16² =
  8. 8.26² =
  9. 9.28² =
  10. 10.12² =
  11. 11.25² =
  12. 12.24² =
  13. 13.14² =
  14. 14.23² =
  15. 15.17² =
  16. 16.18² =
  17. 17.14² =
  18. 18.19² =
  19. 19.13² =
  20. 20.22² =
  21. 21.29² =
  22. 22.21² =
  23. 23.16² =
  24. 24.24² =
  25. 25.23² =
  26. 26.13² =
  27. 27.28² =
  28. 28.19² =
  29. 29.11² =
  30. 30.25² =
  31. 31.25² =
  32. 32.14² =
  33. 33.15² =
  34. 34.19² =
  35. 35.14² =
  36. 36.24² =
  37. 37.18² =
  38. 38.26² =
  39. 39.23² =
  40. 40.28² =

Answer key

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

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