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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 217 · 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. 1.23² =
  2. 2.15² =
  3. 3.11² =
  4. 4.28² =
  5. 5.26² =
  6. 6.29² =
  7. 7.21² =
  8. 8.16² =
  9. 9.18² =
  10. 10.14² =
  11. 11.12² =
  12. 12.17² =
  13. 13.25² =
  14. 14.24² =
  15. 15.13² =
  16. 16.22² =
  17. 17.27² =
  18. 18.19² =
  19. 19.14² =
  20. 20.14² =
  21. 21.23² =
  22. 22.16² =
  23. 23.15² =
  24. 24.13² =
  25. 25.29² =
  26. 26.24² =
  27. 27.16² =
  28. 28.21² =
  29. 29.13² =
  30. 30.12² =
  31. 31.24² =
  32. 32.21² =
  33. 33.11² =
  34. 34.13² =
  35. 35.11² =
  36. 36.26² =
  37. 37.17² =
  38. 38.26² =
  39. 39.24² =
  40. 40.12² =

Answer key

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

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