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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 107 · 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. 1.26² =
  2. 2.11² =
  3. 3.21² =
  4. 4.28² =
  5. 5.29² =
  6. 6.15² =
  7. 7.14² =
  8. 8.25² =
  9. 9.17² =
  10. 10.19² =
  11. 11.16² =
  12. 12.23² =
  13. 13.24² =
  14. 14.18² =
  15. 15.13² =
  16. 16.26² =
  17. 17.14² =
  18. 18.13² =
  19. 19.27² =
  20. 20.22² =
  21. 21.12² =
  22. 22.16² =
  23. 23.16² =
  24. 24.15² =
  25. 25.14² =
  26. 26.24² =
  27. 27.24² =
  28. 28.27² =
  29. 29.24² =
  30. 30.16² =
  31. 31.28² =
  32. 32.23² =
  33. 33.15² =
  34. 34.28² =
  35. 35.23² =
  36. 36.28² =
  37. 37.11² =
  38. 38.21² =
  39. 39.26² =
  40. 40.21² =

Answer key

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

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