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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 307 · 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. 2.22² =
  3. 3.16² =
  4. 4.12² =
  5. 5.19² =
  6. 6.25² =
  7. 7.29² =
  8. 8.14² =
  9. 9.13² =
  10. 10.28² =
  11. 11.11² =
  12. 12.23² =
  13. 13.21² =
  14. 14.17² =
  15. 15.14² =
  16. 16.27² =
  17. 17.23² =
  18. 18.18² =
  19. 19.24² =
  20. 20.26² =
  21. 21.21² =
  22. 22.25² =
  23. 23.11² =
  24. 24.11² =
  25. 25.18² =
  26. 26.22² =
  27. 27.29² =
  28. 28.24² =
  29. 29.24² =
  30. 30.16² =
  31. 31.25² =
  32. 32.28² =
  33. 33.24² =
  34. 34.18² =
  35. 35.16² =
  36. 36.25² =
  37. 37.18² =
  38. 38.18² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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