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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 103 · 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. 2.12² =
  3. 3.19² =
  4. 4.16² =
  5. 5.25² =
  6. 6.23² =
  7. 7.26² =
  8. 8.18² =
  9. 9.24² =
  10. 10.14² =
  11. 11.21² =
  12. 12.11² =
  13. 13.27² =
  14. 14.13² =
  15. 15.17² =
  16. 16.29² =
  17. 17.22² =
  18. 18.28² =
  19. 19.28² =
  20. 20.11² =
  21. 21.21² =
  22. 22.14² =
  23. 23.11² =
  24. 24.19² =
  25. 25.12² =
  26. 26.22² =
  27. 27.24² =
  28. 28.22² =
  29. 29.21² =
  30. 30.17² =
  31. 31.29² =
  32. 32.17² =
  33. 33.13² =
  34. 34.17² =
  35. 35.14² =
  36. 36.28² =
  37. 37.11² =
  38. 38.17² =
  39. 39.25² =
  40. 40.27² =

Answer key

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

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