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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 55 · 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. 1.14² =
  2. 2.12² =
  3. 3.21² =
  4. 4.13² =
  5. 5.24² =
  6. 6.19² =
  7. 7.26² =
  8. 8.23² =
  9. 9.16² =
  10. 10.11² =
  11. 11.15² =
  12. 12.18² =
  13. 13.28² =
  14. 14.17² =
  15. 15.27² =
  16. 16.24² =
  17. 17.25² =
  18. 18.14² =
  19. 19.22² =
  20. 20.29² =
  21. 21.14² =
  22. 22.13² =
  23. 23.11² =
  24. 24.12² =
  25. 25.15² =
  26. 26.22² =
  27. 27.26² =
  28. 28.24² =
  29. 29.12² =
  30. 30.21² =
  31. 31.26² =
  32. 32.16² =
  33. 33.14² =
  34. 34.28² =
  35. 35.19² =
  36. 36.18² =
  37. 37.17² =
  38. 38.25² =
  39. 39.16² =
  40. 40.28² =

Answer key

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

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