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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 411 · 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. 2.24² =
  3. 3.28² =
  4. 4.19² =
  5. 5.12² =
  6. 6.14² =
  7. 7.13² =
  8. 8.29² =
  9. 9.23² =
  10. 10.22² =
  11. 11.11² =
  12. 12.17² =
  13. 13.26² =
  14. 14.27² =
  15. 15.21² =
  16. 16.18² =
  17. 17.15² =
  18. 18.28² =
  19. 19.12² =
  20. 20.25² =
  21. 21.13² =
  22. 22.13² =
  23. 23.24² =
  24. 24.29² =
  25. 25.18² =
  26. 26.18² =
  27. 27.24² =
  28. 28.21² =
  29. 29.23² =
  30. 30.16² =
  31. 31.26² =
  32. 32.14² =
  33. 33.16² =
  34. 34.19² =
  35. 35.29² =
  36. 36.17² =
  37. 37.22² =
  38. 38.12² =
  39. 39.22² =
  40. 40.23² =

Answer key

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

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