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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 774 · 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. 3.27² =
  4. 4.15² =
  5. 5.24² =
  6. 6.26² =
  7. 7.23² =
  8. 8.17² =
  9. 9.16² =
  10. 10.14² =
  11. 11.11² =
  12. 12.29² =
  13. 13.28² =
  14. 14.13² =
  15. 15.22² =
  16. 16.25² =
  17. 17.18² =
  18. 18.19² =
  19. 19.14² =
  20. 20.24² =
  21. 21.17² =
  22. 22.17² =
  23. 23.17² =
  24. 24.29² =
  25. 25.25² =
  26. 26.16² =
  27. 27.21² =
  28. 28.11² =
  29. 29.19² =
  30. 30.27² =
  31. 31.28² =
  32. 32.14² =
  33. 33.27² =
  34. 34.24² =
  35. 35.22² =
  36. 36.14² =
  37. 37.26² =
  38. 38.23² =
  39. 39.11² =
  40. 40.19² =

Answer key

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

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