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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 826 · 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. 1.29² =
  2. 2.21² =
  3. 3.13² =
  4. 4.18² =
  5. 5.17² =
  6. 6.15² =
  7. 7.23² =
  8. 8.26² =
  9. 9.12² =
  10. 10.16² =
  11. 11.11² =
  12. 12.25² =
  13. 13.22² =
  14. 14.14² =
  15. 15.24² =
  16. 16.27² =
  17. 17.27² =
  18. 18.13² =
  19. 19.29² =
  20. 20.28² =
  21. 21.27² =
  22. 22.29² =
  23. 23.19² =
  24. 24.17² =
  25. 25.11² =
  26. 26.13² =
  27. 27.17² =
  28. 28.11² =
  29. 29.18² =
  30. 30.27² =
  31. 31.15² =
  32. 32.16² =
  33. 33.18² =
  34. 34.12² =
  35. 35.15² =
  36. 36.13² =
  37. 37.22² =
  38. 38.21² =
  39. 39.23² =
  40. 40.19² =

Answer key

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

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