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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 850 · 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. 1.11² =
  2. 2.28² =
  3. 3.15² =
  4. 4.24² =
  5. 5.17² =
  6. 6.21² =
  7. 7.23² =
  8. 8.14² =
  9. 9.13² =
  10. 10.16² =
  11. 11.19² =
  12. 12.26² =
  13. 13.27² =
  14. 14.22² =
  15. 15.12² =
  16. 16.18² =
  17. 17.29² =
  18. 18.23² =
  19. 19.14² =
  20. 20.25² =
  21. 21.15² =
  22. 22.18² =
  23. 23.25² =
  24. 24.25² =
  25. 25.25² =
  26. 26.29² =
  27. 27.13² =
  28. 28.15² =
  29. 29.19² =
  30. 30.21² =
  31. 31.23² =
  32. 32.19² =
  33. 33.22² =
  34. 34.21² =
  35. 35.21² =
  36. 36.15² =
  37. 37.18² =
  38. 38.19² =
  39. 39.14² =
  40. 40.15² =

Answer key

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

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