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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 691 · 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. 2.14² =
  3. 3.13² =
  4. 4.21² =
  5. 5.27² =
  6. 6.18² =
  7. 7.23² =
  8. 8.22² =
  9. 9.25² =
  10. 10.24² =
  11. 11.29² =
  12. 12.15² =
  13. 13.26² =
  14. 14.16² =
  15. 15.28² =
  16. 16.17² =
  17. 17.19² =
  18. 18.23² =
  19. 19.12² =
  20. 20.24² =
  21. 21.14² =
  22. 22.24² =
  23. 23.11² =
  24. 24.15² =
  25. 25.13² =
  26. 26.25² =
  27. 27.29² =
  28. 28.29² =
  29. 29.28² =
  30. 30.27² =
  31. 31.21² =
  32. 32.25² =
  33. 33.21² =
  34. 34.19² =
  35. 35.13² =
  36. 36.18² =
  37. 37.29² =
  38. 38.14² =
  39. 39.23² =
  40. 40.17² =

Answer key

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

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