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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 763 · 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. 1.21² =
  2. 2.12² =
  3. 3.25² =
  4. 4.18² =
  5. 5.11² =
  6. 6.24² =
  7. 7.17² =
  8. 8.28² =
  9. 9.26² =
  10. 10.27² =
  11. 11.15² =
  12. 12.13² =
  13. 13.23² =
  14. 14.22² =
  15. 15.19² =
  16. 16.16² =
  17. 17.29² =
  18. 18.14² =
  19. 19.27² =
  20. 20.27² =
  21. 21.12² =
  22. 22.27² =
  23. 23.12² =
  24. 24.19² =
  25. 25.13² =
  26. 26.12² =
  27. 27.23² =
  28. 28.14² =
  29. 29.29² =
  30. 30.23² =
  31. 31.12² =
  32. 32.12² =
  33. 33.27² =
  34. 34.11² =
  35. 35.16² =
  36. 36.29² =
  37. 37.25² =
  38. 38.11² =
  39. 39.21² =
  40. 40.19² =

Answer key

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

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