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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 486 · 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. 2.22² =
  3. 3.26² =
  4. 4.16² =
  5. 5.14² =
  6. 6.13² =
  7. 7.23² =
  8. 8.17² =
  9. 9.24² =
  10. 10.18² =
  11. 11.15² =
  12. 12.12² =
  13. 13.21² =
  14. 14.27² =
  15. 15.29² =
  16. 16.28² =
  17. 17.11² =
  18. 18.19² =
  19. 19.11² =
  20. 20.25² =
  21. 21.24² =
  22. 22.24² =
  23. 23.13² =
  24. 24.25² =
  25. 25.15² =
  26. 26.19² =
  27. 27.15² =
  28. 28.22² =
  29. 29.29² =
  30. 30.25² =
  31. 31.13² =
  32. 32.19² =
  33. 33.23² =
  34. 34.21² =
  35. 35.19² =
  36. 36.27² =
  37. 37.21² =
  38. 38.15² =
  39. 39.19² =
  40. 40.22² =

Answer key

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

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