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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 261 · 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. 1.15² =
  2. 2.13² =
  3. 3.12² =
  4. 4.14² =
  5. 5.23² =
  6. 6.21² =
  7. 7.16² =
  8. 8.24² =
  9. 9.11² =
  10. 10.29² =
  11. 11.26² =
  12. 12.25² =
  13. 13.22² =
  14. 14.17² =
  15. 15.19² =
  16. 16.12² =
  17. 17.28² =
  18. 18.27² =
  19. 19.18² =
  20. 20.25² =
  21. 21.23² =
  22. 22.21² =
  23. 23.12² =
  24. 24.14² =
  25. 25.16² =
  26. 26.16² =
  27. 27.14² =
  28. 28.15² =
  29. 29.24² =
  30. 30.15² =
  31. 31.14² =
  32. 32.21² =
  33. 33.23² =
  34. 34.21² =
  35. 35.26² =
  36. 36.13² =
  37. 37.27² =
  38. 38.14² =
  39. 39.26² =
  40. 40.27² =

Answer key

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

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