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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 214 · 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. 1.15² =
  2. 2.14² =
  3. 3.29² =
  4. 4.18² =
  5. 5.27² =
  6. 6.16² =
  7. 7.12² =
  8. 8.13² =
  9. 9.26² =
  10. 10.22² =
  11. 11.23² =
  12. 12.11² =
  13. 13.19² =
  14. 14.21² =
  15. 15.25² =
  16. 16.26² =
  17. 17.28² =
  18. 18.16² =
  19. 19.24² =
  20. 20.17² =
  21. 21.28² =
  22. 22.16² =
  23. 23.19² =
  24. 24.21² =
  25. 25.23² =
  26. 26.15² =
  27. 27.27² =
  28. 28.11² =
  29. 29.21² =
  30. 30.13² =
  31. 31.19² =
  32. 32.23² =
  33. 33.18² =
  34. 34.11² =
  35. 35.13² =
  36. 36.14² =
  37. 37.24² =
  38. 38.18² =
  39. 39.14² =
  40. 40.15² =

Answer key

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

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