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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 236 · 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. 1.19² =
  2. 2.12² =
  3. 3.21² =
  4. 4.29² =
  5. 5.13² =
  6. 6.18² =
  7. 7.14² =
  8. 8.27² =
  9. 9.23² =
  10. 10.22² =
  11. 11.26² =
  12. 12.16² =
  13. 13.11² =
  14. 14.25² =
  15. 15.21² =
  16. 16.28² =
  17. 17.24² =
  18. 18.17² =
  19. 19.21² =
  20. 20.15² =
  21. 21.19² =
  22. 22.28² =
  23. 23.15² =
  24. 24.19² =
  25. 25.21² =
  26. 26.28² =
  27. 27.22² =
  28. 28.28² =
  29. 29.11² =
  30. 30.11² =
  31. 31.11² =
  32. 32.24² =
  33. 33.24² =
  34. 34.15² =
  35. 35.12² =
  36. 36.14² =
  37. 37.13² =
  38. 38.29² =
  39. 39.19² =
  40. 40.23² =

Answer key

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

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