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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 837 · 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. 1.26² =
  2. 2.21² =
  3. 3.13² =
  4. 4.14² =
  5. 5.16² =
  6. 6.12² =
  7. 7.22² =
  8. 8.23² =
  9. 9.17² =
  10. 10.28² =
  11. 11.18² =
  12. 12.29² =
  13. 13.19² =
  14. 14.11² =
  15. 15.27² =
  16. 16.24² =
  17. 17.25² =
  18. 18.21² =
  19. 19.15² =
  20. 20.14² =
  21. 21.25² =
  22. 22.28² =
  23. 23.13² =
  24. 24.12² =
  25. 25.17² =
  26. 26.16² =
  27. 27.13² =
  28. 28.21² =
  29. 29.25² =
  30. 30.11² =
  31. 31.14² =
  32. 32.22² =
  33. 33.27² =
  34. 34.18² =
  35. 35.22² =
  36. 36.16² =
  37. 37.14² =
  38. 38.23² =
  39. 39.27² =
  40. 40.18² =

Answer key

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

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