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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 617 · 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. 1.23² =
  2. 2.13² =
  3. 3.25² =
  4. 4.22² =
  5. 5.21² =
  6. 6.29² =
  7. 7.14² =
  8. 8.15² =
  9. 9.19² =
  10. 10.26² =
  11. 11.27² =
  12. 12.18² =
  13. 13.17² =
  14. 14.12² =
  15. 15.24² =
  16. 16.28² =
  17. 17.11² =
  18. 18.28² =
  19. 19.17² =
  20. 20.18² =
  21. 21.13² =
  22. 22.16² =
  23. 23.16² =
  24. 24.16² =
  25. 25.21² =
  26. 26.18² =
  27. 27.27² =
  28. 28.13² =
  29. 29.23² =
  30. 30.11² =
  31. 31.16² =
  32. 32.18² =
  33. 33.17² =
  34. 34.23² =
  35. 35.21² =
  36. 36.29² =
  37. 37.14² =
  38. 38.29² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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