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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 378 · 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. 2.12² =
  3. 3.19² =
  4. 4.14² =
  5. 5.22² =
  6. 6.21² =
  7. 7.16² =
  8. 8.17² =
  9. 9.13² =
  10. 10.11² =
  11. 11.24² =
  12. 12.27² =
  13. 13.29² =
  14. 14.18² =
  15. 15.25² =
  16. 16.23² =
  17. 17.26² =
  18. 18.28² =
  19. 19.11² =
  20. 20.14² =
  21. 21.26² =
  22. 22.12² =
  23. 23.13² =
  24. 24.15² =
  25. 25.21² =
  26. 26.28² =
  27. 27.29² =
  28. 28.17² =
  29. 29.17² =
  30. 30.12² =
  31. 31.19² =
  32. 32.14² =
  33. 33.13² =
  34. 34.19² =
  35. 35.25² =
  36. 36.29² =
  37. 37.23² =
  38. 38.16² =
  39. 39.18² =
  40. 40.16² =

Answer key

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

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