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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 622 · 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. 1.18² =
  2. 2.12² =
  3. 3.24² =
  4. 4.16² =
  5. 5.13² =
  6. 6.19² =
  7. 7.21² =
  8. 8.29² =
  9. 9.28² =
  10. 10.15² =
  11. 11.26² =
  12. 12.14² =
  13. 13.23² =
  14. 14.17² =
  15. 15.27² =
  16. 16.25² =
  17. 17.11² =
  18. 18.22² =
  19. 19.11² =
  20. 20.23² =
  21. 21.17² =
  22. 22.18² =
  23. 23.16² =
  24. 24.14² =
  25. 25.13² =
  26. 26.28² =
  27. 27.21² =
  28. 28.28² =
  29. 29.16² =
  30. 30.14² =
  31. 31.16² =
  32. 32.14² =
  33. 33.14² =
  34. 34.22² =
  35. 35.28² =
  36. 36.17² =
  37. 37.11² =
  38. 38.21² =
  39. 39.24² =
  40. 40.23² =

Answer key

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

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