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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 828 · 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. 2.12² =
  3. 3.24² =
  4. 4.25² =
  5. 5.23² =
  6. 6.15² =
  7. 7.21² =
  8. 8.16² =
  9. 9.18² =
  10. 10.29² =
  11. 11.19² =
  12. 12.17² =
  13. 13.11² =
  14. 14.28² =
  15. 15.26² =
  16. 16.13² =
  17. 17.27² =
  18. 18.16² =
  19. 19.22² =
  20. 20.14² =
  21. 21.11² =
  22. 22.23² =
  23. 23.26² =
  24. 24.16² =
  25. 25.29² =
  26. 26.22² =
  27. 27.27² =
  28. 28.28² =
  29. 29.16² =
  30. 30.29² =
  31. 31.13² =
  32. 32.22² =
  33. 33.19² =
  34. 34.28² =
  35. 35.27² =
  36. 36.21² =
  37. 37.18² =
  38. 38.12² =
  39. 39.17² =
  40. 40.12² =

Answer key

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

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