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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 623 · 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. 1.15² =
  2. 2.23² =
  3. 3.13² =
  4. 4.11² =
  5. 5.25² =
  6. 6.29² =
  7. 7.27² =
  8. 8.26² =
  9. 9.21² =
  10. 10.24² =
  11. 11.14² =
  12. 12.16² =
  13. 13.18² =
  14. 14.17² =
  15. 15.28² =
  16. 16.12² =
  17. 17.19² =
  18. 18.24² =
  19. 19.22² =
  20. 20.15² =
  21. 21.14² =
  22. 22.21² =
  23. 23.28² =
  24. 24.18² =
  25. 25.13² =
  26. 26.14² =
  27. 27.24² =
  28. 28.11² =
  29. 29.29² =
  30. 30.16² =
  31. 31.28² =
  32. 32.11² =
  33. 33.17² =
  34. 34.22² =
  35. 35.23² =
  36. 36.26² =
  37. 37.14² =
  38. 38.14² =
  39. 39.22² =
  40. 40.22² =

Answer key

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

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