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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 137 · 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. 3.21² =
  4. 4.16² =
  5. 5.14² =
  6. 6.17² =
  7. 7.18² =
  8. 8.13² =
  9. 9.27² =
  10. 10.26² =
  11. 11.22² =
  12. 12.23² =
  13. 13.15² =
  14. 14.24² =
  15. 15.25² =
  16. 16.11² =
  17. 17.17² =
  18. 18.12² =
  19. 19.28² =
  20. 20.29² =
  21. 21.19² =
  22. 22.21² =
  23. 23.26² =
  24. 24.16² =
  25. 25.26² =
  26. 26.27² =
  27. 27.11² =
  28. 28.24² =
  29. 29.29² =
  30. 30.14² =
  31. 31.16² =
  32. 32.15² =
  33. 33.28² =
  34. 34.11² =
  35. 35.17² =
  36. 36.21² =
  37. 37.28² =
  38. 38.15² =
  39. 39.22² =
  40. 40.11² =

Answer key

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

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