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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 634 · 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. 1.23² =
  2. 2.21² =
  3. 3.22² =
  4. 4.26² =
  5. 5.29² =
  6. 6.12² =
  7. 7.11² =
  8. 8.27² =
  9. 9.16² =
  10. 10.15² =
  11. 11.19² =
  12. 12.25² =
  13. 13.14² =
  14. 14.13² =
  15. 15.24² =
  16. 16.18² =
  17. 17.21² =
  18. 18.17² =
  19. 19.23² =
  20. 20.28² =
  21. 21.21² =
  22. 22.13² =
  23. 23.16² =
  24. 24.25² =
  25. 25.27² =
  26. 26.25² =
  27. 27.23² =
  28. 28.21² =
  29. 29.21² =
  30. 30.14² =
  31. 31.28² =
  32. 32.29² =
  33. 33.11² =
  34. 34.15² =
  35. 35.16² =
  36. 36.17² =
  37. 37.14² =
  38. 38.27² =
  39. 39.24² =
  40. 40.21² =

Answer key

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

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