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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 78 · 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. 1.16² =
  2. 2.27² =
  3. 3.26² =
  4. 4.14² =
  5. 5.12² =
  6. 6.24² =
  7. 7.21² =
  8. 8.13² =
  9. 9.23² =
  10. 10.15² =
  11. 11.18² =
  12. 12.17² =
  13. 13.29² =
  14. 14.16² =
  15. 15.13² =
  16. 16.28² =
  17. 17.22² =
  18. 18.11² =
  19. 19.25² =
  20. 20.27² =
  21. 21.19² =
  22. 22.17² =
  23. 23.15² =
  24. 24.27² =
  25. 25.19² =
  26. 26.21² =
  27. 27.11² =
  28. 28.28² =
  29. 29.12² =
  30. 30.21² =
  31. 31.25² =
  32. 32.12² =
  33. 33.25² =
  34. 34.19² =
  35. 35.24² =
  36. 36.16² =
  37. 37.13² =
  38. 38.23² =
  39. 39.13² =
  40. 40.22² =

Answer key

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

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