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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 671 · 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. 2.18² =
  3. 3.19² =
  4. 4.14² =
  5. 5.23² =
  6. 6.17² =
  7. 7.29² =
  8. 8.13² =
  9. 9.22² =
  10. 10.24² =
  11. 11.25² =
  12. 12.27² =
  13. 13.11² =
  14. 14.21² =
  15. 15.16² =
  16. 16.28² =
  17. 17.21² =
  18. 18.26² =
  19. 19.15² =
  20. 20.22² =
  21. 21.29² =
  22. 22.27² =
  23. 23.19² =
  24. 24.22² =
  25. 25.23² =
  26. 26.23² =
  27. 27.24² =
  28. 28.17² =
  29. 29.19² =
  30. 30.27² =
  31. 31.17² =
  32. 32.28² =
  33. 33.11² =
  34. 34.22² =
  35. 35.25² =
  36. 36.19² =
  37. 37.14² =
  38. 38.26² =
  39. 39.25² =
  40. 40.18² =

Answer key

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

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