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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 795 · 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. 3.13² =
  4. 4.21² =
  5. 5.19² =
  6. 6.29² =
  7. 7.16² =
  8. 8.25² =
  9. 9.28² =
  10. 10.26² =
  11. 11.18² =
  12. 12.24² =
  13. 13.17² =
  14. 14.23² =
  15. 15.11² =
  16. 16.22² =
  17. 17.12² =
  18. 18.27² =
  19. 19.29² =
  20. 20.29² =
  21. 21.27² =
  22. 22.19² =
  23. 23.15² =
  24. 24.25² =
  25. 25.17² =
  26. 26.13² =
  27. 27.24² =
  28. 28.15² =
  29. 29.16² =
  30. 30.25² =
  31. 31.19² =
  32. 32.23² =
  33. 33.18² =
  34. 34.21² =
  35. 35.22² =
  36. 36.18² =
  37. 37.21² =
  38. 38.14² =
  39. 39.17² =
  40. 40.27² =

Answer key

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

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