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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 479 · 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. 1.27² =
  2. 2.28² =
  3. 3.26² =
  4. 4.21² =
  5. 5.23² =
  6. 6.18² =
  7. 7.17² =
  8. 8.29² =
  9. 9.19² =
  10. 10.15² =
  11. 11.22² =
  12. 12.24² =
  13. 13.11² =
  14. 14.13² =
  15. 15.16² =
  16. 16.12² =
  17. 17.14² =
  18. 18.25² =
  19. 19.22² =
  20. 20.18² =
  21. 21.26² =
  22. 22.24² =
  23. 23.11² =
  24. 24.23² =
  25. 25.28² =
  26. 26.21² =
  27. 27.21² =
  28. 28.13² =
  29. 29.29² =
  30. 30.17² =
  31. 31.23² =
  32. 32.15² =
  33. 33.27² =
  34. 34.12² =
  35. 35.27² =
  36. 36.29² =
  37. 37.21² =
  38. 38.26² =
  39. 39.21² =
  40. 40.29² =

Answer key

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

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