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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 523 · 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. 1.27² =
  2. 2.13² =
  3. 3.15² =
  4. 4.11² =
  5. 5.12² =
  6. 6.25² =
  7. 7.26² =
  8. 8.16² =
  9. 9.17² =
  10. 10.19² =
  11. 11.21² =
  12. 12.29² =
  13. 13.24² =
  14. 14.14² =
  15. 15.28² =
  16. 16.23² =
  17. 17.18² =
  18. 18.22² =
  19. 19.24² =
  20. 20.11² =
  21. 21.22² =
  22. 22.21² =
  23. 23.23² =
  24. 24.28² =
  25. 25.23² =
  26. 26.24² =
  27. 27.27² =
  28. 28.14² =
  29. 29.13² =
  30. 30.24² =
  31. 31.17² =
  32. 32.11² =
  33. 33.15² =
  34. 34.21² =
  35. 35.15² =
  36. 36.28² =
  37. 37.23² =
  38. 38.26² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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