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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 873 · 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. 2.14² =
  3. 3.19² =
  4. 4.22² =
  5. 5.28² =
  6. 6.15² =
  7. 7.18² =
  8. 8.26² =
  9. 9.11² =
  10. 10.27² =
  11. 11.23² =
  12. 12.21² =
  13. 13.24² =
  14. 14.29² =
  15. 15.25² =
  16. 16.13² =
  17. 17.12² =
  18. 18.17² =
  19. 19.19² =
  20. 20.16² =
  21. 21.28² =
  22. 22.24² =
  23. 23.27² =
  24. 24.12² =
  25. 25.27² =
  26. 26.11² =
  27. 27.12² =
  28. 28.14² =
  29. 29.15² =
  30. 30.15² =
  31. 31.22² =
  32. 32.13² =
  33. 33.21² =
  34. 34.17² =
  35. 35.11² =
  36. 36.25² =
  37. 37.28² =
  38. 38.16² =
  39. 39.23² =
  40. 40.28² =

Answer key

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

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