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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 553 · 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. 1.15² =
  2. 2.13² =
  3. 3.25² =
  4. 4.18² =
  5. 5.14² =
  6. 6.19² =
  7. 7.26² =
  8. 8.16² =
  9. 9.21² =
  10. 10.24² =
  11. 11.23² =
  12. 12.29² =
  13. 13.27² =
  14. 14.12² =
  15. 15.17² =
  16. 16.22² =
  17. 17.28² =
  18. 18.11² =
  19. 19.18² =
  20. 20.29² =
  21. 21.24² =
  22. 22.15² =
  23. 23.16² =
  24. 24.11² =
  25. 25.11² =
  26. 26.29² =
  27. 27.14² =
  28. 28.11² =
  29. 29.21² =
  30. 30.11² =
  31. 31.21² =
  32. 32.12² =
  33. 33.22² =
  34. 34.25² =
  35. 35.16² =
  36. 36.17² =
  37. 37.27² =
  38. 38.21² =
  39. 39.23² =
  40. 40.16² =

Answer key

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

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