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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 883 · 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. 2.16² =
  3. 3.21² =
  4. 4.22² =
  5. 5.24² =
  6. 6.11² =
  7. 7.17² =
  8. 8.18² =
  9. 9.12² =
  10. 10.19² =
  11. 11.29² =
  12. 12.14² =
  13. 13.25² =
  14. 14.23² =
  15. 15.27² =
  16. 16.26² =
  17. 17.21² =
  18. 18.15² =
  19. 19.28² =
  20. 20.16² =
  21. 21.19² =
  22. 22.17² =
  23. 23.21² =
  24. 24.28² =
  25. 25.11² =
  26. 26.18² =
  27. 27.29² =
  28. 28.13² =
  29. 29.24² =
  30. 30.15² =
  31. 31.15² =
  32. 32.11² =
  33. 33.29² =
  34. 34.24² =
  35. 35.16² =
  36. 36.13² =
  37. 37.15² =
  38. 38.13² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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