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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 715 · 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. 1.14² =
  2. 2.11² =
  3. 3.18² =
  4. 4.27² =
  5. 5.12² =
  6. 6.24² =
  7. 7.21² =
  8. 8.13² =
  9. 9.15² =
  10. 10.22² =
  11. 11.26² =
  12. 12.28² =
  13. 13.29² =
  14. 14.25² =
  15. 15.19² =
  16. 16.17² =
  17. 17.16² =
  18. 18.11² =
  19. 19.23² =
  20. 20.11² =
  21. 21.25² =
  22. 22.21² =
  23. 23.19² =
  24. 24.21² =
  25. 25.18² =
  26. 26.12² =
  27. 27.21² =
  28. 28.24² =
  29. 29.21² =
  30. 30.24² =
  31. 31.18² =
  32. 32.18² =
  33. 33.23² =
  34. 34.28² =
  35. 35.27² =
  36. 36.15² =
  37. 37.29² =
  38. 38.12² =
  39. 39.24² =
  40. 40.21² =

Answer key

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

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