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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 195 · 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. 1.13² =
  2. 2.24² =
  3. 3.25² =
  4. 4.19² =
  5. 5.27² =
  6. 6.11² =
  7. 7.14² =
  8. 8.26² =
  9. 9.23² =
  10. 10.15² =
  11. 11.16² =
  12. 12.21² =
  13. 13.12² =
  14. 14.22² =
  15. 15.28² =
  16. 16.21² =
  17. 17.29² =
  18. 18.21² =
  19. 19.17² =
  20. 20.18² =
  21. 21.16² =
  22. 22.27² =
  23. 23.23² =
  24. 24.25² =
  25. 25.21² =
  26. 26.24² =
  27. 27.21² =
  28. 28.19² =
  29. 29.15² =
  30. 30.19² =
  31. 31.16² =
  32. 32.17² =
  33. 33.19² =
  34. 34.14² =
  35. 35.11² =
  36. 36.16² =
  37. 37.29² =
  38. 38.26² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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