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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 782 · 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. 1.22² =
  2. 2.21² =
  3. 3.15² =
  4. 4.11² =
  5. 5.17² =
  6. 6.27² =
  7. 7.13² =
  8. 8.29² =
  9. 9.28² =
  10. 10.25² =
  11. 11.14² =
  12. 12.18² =
  13. 13.26² =
  14. 14.19² =
  15. 15.23² =
  16. 16.16² =
  17. 17.24² =
  18. 18.12² =
  19. 19.18² =
  20. 20.27² =
  21. 21.19² =
  22. 22.12² =
  23. 23.14² =
  24. 24.27² =
  25. 25.14² =
  26. 26.11² =
  27. 27.26² =
  28. 28.27² =
  29. 29.18² =
  30. 30.24² =
  31. 31.14² =
  32. 32.21² =
  33. 33.23² =
  34. 34.24² =
  35. 35.11² =
  36. 36.24² =
  37. 37.21² =
  38. 38.12² =
  39. 39.25² =
  40. 40.19² =

Answer key

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

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