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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 230 · 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. 2.17² =
  3. 3.19² =
  4. 4.15² =
  5. 5.18² =
  6. 6.21² =
  7. 7.12² =
  8. 8.16² =
  9. 9.24² =
  10. 10.14² =
  11. 11.11² =
  12. 12.28² =
  13. 13.25² =
  14. 14.23² =
  15. 15.24² =
  16. 16.26² =
  17. 17.18² =
  18. 18.22² =
  19. 19.21² =
  20. 20.29² =
  21. 21.21² =
  22. 22.27² =
  23. 23.28² =
  24. 24.22² =
  25. 25.16² =
  26. 26.22² =
  27. 27.23² =
  28. 28.21² =
  29. 29.24² =
  30. 30.29² =
  31. 31.19² =
  32. 32.21² =
  33. 33.11² =
  34. 34.21² =
  35. 35.17² =
  36. 36.11² =
  37. 37.15² =
  38. 38.29² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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