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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 286 · 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. 2.24² =
  3. 3.22² =
  4. 4.19² =
  5. 5.21² =
  6. 6.26² =
  7. 7.29² =
  8. 8.17² =
  9. 9.16² =
  10. 10.25² =
  11. 11.28² =
  12. 12.11² =
  13. 13.12² =
  14. 14.14² =
  15. 15.27² =
  16. 16.16² =
  17. 17.18² =
  18. 18.13² =
  19. 19.15² =
  20. 20.13² =
  21. 21.29² =
  22. 22.15² =
  23. 23.24² =
  24. 24.16² =
  25. 25.25² =
  26. 26.29² =
  27. 27.22² =
  28. 28.15² =
  29. 29.16² =
  30. 30.29² =
  31. 31.18² =
  32. 32.21² =
  33. 33.17² =
  34. 34.21² =
  35. 35.11² =
  36. 36.27² =
  37. 37.11² =
  38. 38.13² =
  39. 39.18² =
  40. 40.23² =

Answer key

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

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