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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 511 · 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. 1.11² =
  2. 2.23² =
  3. 3.26² =
  4. 4.19² =
  5. 5.27² =
  6. 6.21² =
  7. 7.17² =
  8. 8.22² =
  9. 9.13² =
  10. 10.18² =
  11. 11.12² =
  12. 12.16² =
  13. 13.24² =
  14. 14.14² =
  15. 15.28² =
  16. 16.25² =
  17. 17.29² =
  18. 18.18² =
  19. 19.11² =
  20. 20.17² =
  21. 21.15² =
  22. 22.23² =
  23. 23.22² =
  24. 24.24² =
  25. 25.11² =
  26. 26.21² =
  27. 27.23² =
  28. 28.21² =
  29. 29.25² =
  30. 30.29² =
  31. 31.13² =
  32. 32.12² =
  33. 33.11² =
  34. 34.17² =
  35. 35.13² =
  36. 36.24² =
  37. 37.26² =
  38. 38.26² =
  39. 39.15² =
  40. 40.29² =

Answer key

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

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