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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 366 · 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. 1.15² =
  2. 2.24² =
  3. 3.13² =
  4. 4.21² =
  5. 5.17² =
  6. 6.22² =
  7. 7.23² =
  8. 8.29² =
  9. 9.27² =
  10. 10.11² =
  11. 11.12² =
  12. 12.19² =
  13. 13.18² =
  14. 14.14² =
  15. 15.25² =
  16. 16.16² =
  17. 17.28² =
  18. 18.26² =
  19. 19.19² =
  20. 20.22² =
  21. 21.21² =
  22. 22.25² =
  23. 23.17² =
  24. 24.11² =
  25. 25.24² =
  26. 26.23² =
  27. 27.24² =
  28. 28.29² =
  29. 29.25² =
  30. 30.26² =
  31. 31.15² =
  32. 32.11² =
  33. 33.13² =
  34. 34.16² =
  35. 35.15² =
  36. 36.19² =
  37. 37.19² =
  38. 38.16² =
  39. 39.17² =
  40. 40.13² =

Answer key

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

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