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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 188 · 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. 1.29² =
  2. 2.13² =
  3. 3.23² =
  4. 4.25² =
  5. 5.12² =
  6. 6.15² =
  7. 7.21² =
  8. 8.27² =
  9. 9.28² =
  10. 10.17² =
  11. 11.11² =
  12. 12.24² =
  13. 13.22² =
  14. 14.16² =
  15. 15.26² =
  16. 16.24² =
  17. 17.19² =
  18. 18.18² =
  19. 19.14² =
  20. 20.21² =
  21. 21.29² =
  22. 22.24² =
  23. 23.19² =
  24. 24.14² =
  25. 25.23² =
  26. 26.23² =
  27. 27.29² =
  28. 28.27² =
  29. 29.14² =
  30. 30.22² =
  31. 31.12² =
  32. 32.18² =
  33. 33.27² =
  34. 34.23² =
  35. 35.13² =
  36. 36.17² =
  37. 37.29² =
  38. 38.15² =
  39. 39.23² =
  40. 40.29² =

Answer key

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

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