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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 269 · 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. 1.14² =
  2. 2.19² =
  3. 3.12² =
  4. 4.23² =
  5. 5.16² =
  6. 6.22² =
  7. 7.21² =
  8. 8.18² =
  9. 9.11² =
  10. 10.25² =
  11. 11.28² =
  12. 12.29² =
  13. 13.15² =
  14. 14.13² =
  15. 15.26² =
  16. 16.27² =
  17. 17.24² =
  18. 18.17² =
  19. 19.23² =
  20. 20.15² =
  21. 21.25² =
  22. 22.13² =
  23. 23.24² =
  24. 24.11² =
  25. 25.29² =
  26. 26.21² =
  27. 27.29² =
  28. 28.21² =
  29. 29.16² =
  30. 30.22² =
  31. 31.27² =
  32. 32.12² =
  33. 33.11² =
  34. 34.21² =
  35. 35.21² =
  36. 36.19² =
  37. 37.14² =
  38. 38.15² =
  39. 39.24² =
  40. 40.22² =

Answer key

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

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