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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 289 · 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. 2.17² =
  3. 3.28² =
  4. 4.18² =
  5. 5.24² =
  6. 6.22² =
  7. 7.14² =
  8. 8.11² =
  9. 9.25² =
  10. 10.21² =
  11. 11.16² =
  12. 12.13² =
  13. 13.29² =
  14. 14.19² =
  15. 15.14² =
  16. 16.26² =
  17. 17.15² =
  18. 18.12² =
  19. 19.24² =
  20. 20.27² =
  21. 21.27² =
  22. 22.23² =
  23. 23.19² =
  24. 24.26² =
  25. 25.12² =
  26. 26.27² =
  27. 27.12² =
  28. 28.14² =
  29. 29.29² =
  30. 30.19² =
  31. 31.15² =
  32. 32.23² =
  33. 33.19² =
  34. 34.19² =
  35. 35.22² =
  36. 36.13² =
  37. 37.27² =
  38. 38.25² =
  39. 39.25² =
  40. 40.27² =

Answer key

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

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