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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 203 · 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. 1.14² =
  2. 2.12² =
  3. 3.11² =
  4. 4.21² =
  5. 5.16² =
  6. 6.28² =
  7. 7.25² =
  8. 8.27² =
  9. 9.24² =
  10. 10.18² =
  11. 11.19² =
  12. 12.17² =
  13. 13.13² =
  14. 14.15² =
  15. 15.26² =
  16. 16.13² =
  17. 17.26² =
  18. 18.26² =
  19. 19.22² =
  20. 20.23² =
  21. 21.16² =
  22. 22.29² =
  23. 23.21² =
  24. 24.11² =
  25. 25.25² =
  26. 26.12² =
  27. 27.21² =
  28. 28.23² =
  29. 29.16² =
  30. 30.18² =
  31. 31.23² =
  32. 32.27² =
  33. 33.28² =
  34. 34.14² =
  35. 35.25² =
  36. 36.13² =
  37. 37.17² =
  38. 38.25² =
  39. 39.17² =
  40. 40.28² =

Answer key

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

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