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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 673 · 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. 1.12² =
  2. 2.23² =
  3. 3.24² =
  4. 4.29² =
  5. 5.21² =
  6. 6.22² =
  7. 7.25² =
  8. 8.15² =
  9. 9.18² =
  10. 10.16² =
  11. 11.28² =
  12. 12.19² =
  13. 13.27² =
  14. 14.11² =
  15. 15.14² =
  16. 16.13² =
  17. 17.26² =
  18. 18.17² =
  19. 19.17² =
  20. 20.28² =
  21. 21.21² =
  22. 22.19² =
  23. 23.27² =
  24. 24.23² =
  25. 25.23² =
  26. 26.18² =
  27. 27.12² =
  28. 28.18² =
  29. 29.15² =
  30. 30.28² =
  31. 31.27² =
  32. 32.29² =
  33. 33.27² =
  34. 34.23² =
  35. 35.14² =
  36. 36.12² =
  37. 37.11² =
  38. 38.16² =
  39. 39.19² =
  40. 40.14² =

Answer key

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

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