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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 331 · 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. 1.17² =
  2. 2.14² =
  3. 3.22² =
  4. 4.25² =
  5. 5.28² =
  6. 6.29² =
  7. 7.13² =
  8. 8.23² =
  9. 9.21² =
  10. 10.18² =
  11. 11.27² =
  12. 12.24² =
  13. 13.23² =
  14. 14.15² =
  15. 15.19² =
  16. 16.12² =
  17. 17.11² =
  18. 18.16² =
  19. 19.26² =
  20. 20.22² =
  21. 21.26² =
  22. 22.28² =
  23. 23.19² =
  24. 24.17² =
  25. 25.18² =
  26. 26.13² =
  27. 27.25² =
  28. 28.14² =
  29. 29.13² =
  30. 30.27² =
  31. 31.21² =
  32. 32.12² =
  33. 33.25² =
  34. 34.19² =
  35. 35.12² =
  36. 36.24² =
  37. 37.15² =
  38. 38.12² =
  39. 39.11² =
  40. 40.23² =

Answer key

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

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