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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 830 · 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. 1.28² =
  2. 2.14² =
  3. 3.15² =
  4. 4.13² =
  5. 5.23² =
  6. 6.12² =
  7. 7.22² =
  8. 8.24² =
  9. 9.17² =
  10. 10.25² =
  11. 11.19² =
  12. 12.16² =
  13. 13.11² =
  14. 14.21² =
  15. 15.18² =
  16. 16.29² =
  17. 17.26² =
  18. 18.19² =
  19. 19.27² =
  20. 20.27² =
  21. 21.14² =
  22. 22.29² =
  23. 23.25² =
  24. 24.15² =
  25. 25.25² =
  26. 26.23² =
  27. 27.16² =
  28. 28.24² =
  29. 29.26² =
  30. 30.22² =
  31. 31.21² =
  32. 32.21² =
  33. 33.22² =
  34. 34.14² =
  35. 35.29² =
  36. 36.22² =
  37. 37.12² =
  38. 38.14² =
  39. 39.11² =
  40. 40.18² =

Answer key

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

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