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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 806 · 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. 2.15² =
  3. 3.21² =
  4. 4.19² =
  5. 5.18² =
  6. 6.13² =
  7. 7.26² =
  8. 8.11² =
  9. 9.12² =
  10. 10.27² =
  11. 11.29² =
  12. 12.24² =
  13. 13.22² =
  14. 14.17² =
  15. 15.28² =
  16. 16.16² =
  17. 17.16² =
  18. 18.25² =
  19. 19.13² =
  20. 20.12² =
  21. 21.13² =
  22. 22.17² =
  23. 23.16² =
  24. 24.23² =
  25. 25.17² =
  26. 26.29² =
  27. 27.16² =
  28. 28.11² =
  29. 29.29² =
  30. 30.16² =
  31. 31.16² =
  32. 32.18² =
  33. 33.21² =
  34. 34.13² =
  35. 35.12² =
  36. 36.27² =
  37. 37.21² =
  38. 38.11² =
  39. 39.15² =
  40. 40.27² =

Answer key

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

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