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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 611 · 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. 2.21² =
  3. 3.14² =
  4. 4.22² =
  5. 5.17² =
  6. 6.15² =
  7. 7.19² =
  8. 8.13² =
  9. 9.25² =
  10. 10.16² =
  11. 11.11² =
  12. 12.29² =
  13. 13.15² =
  14. 14.23² =
  15. 15.27² =
  16. 16.18² =
  17. 17.12² =
  18. 18.24² =
  19. 19.12² =
  20. 20.26² =
  21. 21.15² =
  22. 22.12² =
  23. 23.19² =
  24. 24.28² =
  25. 25.12² =
  26. 26.14² =
  27. 27.22² =
  28. 28.28² =
  29. 29.28² =
  30. 30.14² =
  31. 31.13² =
  32. 32.18² =
  33. 33.13² =
  34. 34.21² =
  35. 35.22² =
  36. 36.14² =
  37. 37.25² =
  38. 38.11² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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