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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 702 · 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. 2.13² =
  3. 3.23² =
  4. 4.14² =
  5. 5.25² =
  6. 6.27² =
  7. 7.21² =
  8. 8.24² =
  9. 9.17² =
  10. 10.11² =
  11. 11.16² =
  12. 12.29² =
  13. 13.19² =
  14. 14.12² =
  15. 15.28² =
  16. 16.18² =
  17. 17.26² =
  18. 18.22² =
  19. 19.15² =
  20. 20.21² =
  21. 21.27² =
  22. 22.26² =
  23. 23.17² =
  24. 24.11² =
  25. 25.29² =
  26. 26.24² =
  27. 27.14² =
  28. 28.29² =
  29. 29.13² =
  30. 30.25² =
  31. 31.16² =
  32. 32.13² =
  33. 33.21² =
  34. 34.13² =
  35. 35.11² =
  36. 36.28² =
  37. 37.16² =
  38. 38.12² =
  39. 39.21² =
  40. 40.28² =

Answer key

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

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