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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 138 · 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. 1.19² =
  2. 2.12² =
  3. 3.28² =
  4. 4.15² =
  5. 5.23² =
  6. 6.16² =
  7. 7.25² =
  8. 8.13² =
  9. 9.11² =
  10. 10.27² =
  11. 11.17² =
  12. 12.22² =
  13. 13.29² =
  14. 14.21² =
  15. 15.14² =
  16. 16.24² =
  17. 17.14² =
  18. 18.18² =
  19. 19.16² =
  20. 20.19² =
  21. 21.12² =
  22. 22.29² =
  23. 23.18² =
  24. 24.12² =
  25. 25.13² =
  26. 26.26² =
  27. 27.12² =
  28. 28.22² =
  29. 29.15² =
  30. 30.19² =
  31. 31.11² =
  32. 32.21² =
  33. 33.24² =
  34. 34.17² =
  35. 35.16² =
  36. 36.16² =
  37. 37.29² =
  38. 38.15² =
  39. 39.15² =
  40. 40.24² =

Answer key

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

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