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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 212 · 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. 1.29² =
  2. 2.15² =
  3. 3.21² =
  4. 4.19² =
  5. 5.18² =
  6. 6.28² =
  7. 7.23² =
  8. 8.16² =
  9. 9.11² =
  10. 10.25² =
  11. 11.12² =
  12. 12.22² =
  13. 13.13² =
  14. 14.26² =
  15. 15.24² =
  16. 16.27² =
  17. 17.23² =
  18. 18.12² =
  19. 19.17² =
  20. 20.24² =
  21. 21.17² =
  22. 22.14² =
  23. 23.28² =
  24. 24.29² =
  25. 25.29² =
  26. 26.24² =
  27. 27.25² =
  28. 28.15² =
  29. 29.21² =
  30. 30.13² =
  31. 31.13² =
  32. 32.27² =
  33. 33.25² =
  34. 34.24² =
  35. 35.19² =
  36. 36.25² =
  37. 37.17² =
  38. 38.27² =
  39. 39.18² =
  40. 40.25² =

Answer key

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

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