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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 142 · 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. 1.13² =
  2. 2.24² =
  3. 3.12² =
  4. 4.16² =
  5. 5.19² =
  6. 6.15² =
  7. 7.18² =
  8. 8.21² =
  9. 9.11² =
  10. 10.28² =
  11. 11.17² =
  12. 12.14² =
  13. 13.26² =
  14. 14.22² =
  15. 15.23² =
  16. 16.27² =
  17. 17.29² =
  18. 18.25² =
  19. 19.14² =
  20. 20.21² =
  21. 21.16² =
  22. 22.14² =
  23. 23.17² =
  24. 24.11² =
  25. 25.26² =
  26. 26.25² =
  27. 27.13² =
  28. 28.21² =
  29. 29.29² =
  30. 30.18² =
  31. 31.27² =
  32. 32.23² =
  33. 33.12² =
  34. 34.21² =
  35. 35.23² =
  36. 36.11² =
  37. 37.15² =
  38. 38.16² =
  39. 39.23² =
  40. 40.12² =

Answer key

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

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