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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 633 · 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. 2.24² =
  3. 3.12² =
  4. 4.22² =
  5. 5.13² =
  6. 6.29² =
  7. 7.14² =
  8. 8.26² =
  9. 9.25² =
  10. 10.17² =
  11. 11.21² =
  12. 12.27² =
  13. 13.28² =
  14. 14.16² =
  15. 15.15² =
  16. 16.18² =
  17. 17.27² =
  18. 18.27² =
  19. 19.11² =
  20. 20.19² =
  21. 21.21² =
  22. 22.12² =
  23. 23.24² =
  24. 24.12² =
  25. 25.14² =
  26. 26.16² =
  27. 27.26² =
  28. 28.15² =
  29. 29.29² =
  30. 30.17² =
  31. 31.21² =
  32. 32.23² =
  33. 33.13² =
  34. 34.13² =
  35. 35.28² =
  36. 36.11² =
  37. 37.17² =
  38. 38.29² =
  39. 39.18² =
  40. 40.12² =

Answer key

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

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