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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 802 · 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. 1.13² =
  2. 2.26² =
  3. 3.24² =
  4. 4.25² =
  5. 5.17² =
  6. 6.14² =
  7. 7.23² =
  8. 8.29² =
  9. 9.15² =
  10. 10.19² =
  11. 11.28² =
  12. 12.12² =
  13. 13.16² =
  14. 14.11² =
  15. 15.27² =
  16. 16.18² =
  17. 17.22² =
  18. 18.21² =
  19. 19.11² =
  20. 20.21² =
  21. 21.14² =
  22. 22.21² =
  23. 23.25² =
  24. 24.24² =
  25. 25.13² =
  26. 26.26² =
  27. 27.25² =
  28. 28.11² =
  29. 29.29² =
  30. 30.21² =
  31. 31.14² =
  32. 32.28² =
  33. 33.17² =
  34. 34.15² =
  35. 35.21² =
  36. 36.17² =
  37. 37.24² =
  38. 38.14² =
  39. 39.18² =
  40. 40.12² =

Answer key

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

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