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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 151 · 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. 1.11² =
  2. 2.15² =
  3. 3.16² =
  4. 4.13² =
  5. 5.29² =
  6. 6.22² =
  7. 7.19² =
  8. 8.24² =
  9. 9.23² =
  10. 10.26² =
  11. 11.17² =
  12. 12.18² =
  13. 13.25² =
  14. 14.28² =
  15. 15.12² =
  16. 16.14² =
  17. 17.16² =
  18. 18.21² =
  19. 19.27² =
  20. 20.15² =
  21. 21.24² =
  22. 22.17² =
  23. 23.13² =
  24. 24.26² =
  25. 25.22² =
  26. 26.27² =
  27. 27.22² =
  28. 28.12² =
  29. 29.23² =
  30. 30.21² =
  31. 31.21² =
  32. 32.29² =
  33. 33.19² =
  34. 34.21² =
  35. 35.24² =
  36. 36.11² =
  37. 37.17² =
  38. 38.12² =
  39. 39.21² =
  40. 40.23² =

Answer key

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

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