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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 573 · 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. 1.25² =
  2. 2.14² =
  3. 3.19² =
  4. 4.18² =
  5. 5.11² =
  6. 6.27² =
  7. 7.26² =
  8. 8.28² =
  9. 9.12² =
  10. 10.22² =
  11. 11.17² =
  12. 12.16² =
  13. 13.23² =
  14. 14.21² =
  15. 15.15² =
  16. 16.19² =
  17. 17.29² =
  18. 18.13² =
  19. 19.28² =
  20. 20.16² =
  21. 21.24² =
  22. 22.22² =
  23. 23.12² =
  24. 24.18² =
  25. 25.14² =
  26. 26.21² =
  27. 27.21² =
  28. 28.25² =
  29. 29.23² =
  30. 30.16² =
  31. 31.23² =
  32. 32.25² =
  33. 33.14² =
  34. 34.22² =
  35. 35.16² =
  36. 36.13² =
  37. 37.28² =
  38. 38.21² =
  39. 39.22² =
  40. 40.22² =

Answer key

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

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