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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 176 · 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. 2.14² =
  3. 3.24² =
  4. 4.21² =
  5. 5.26² =
  6. 6.18² =
  7. 7.13² =
  8. 8.12² =
  9. 9.19² =
  10. 10.23² =
  11. 11.22² =
  12. 12.28² =
  13. 13.15² =
  14. 14.25² =
  15. 15.16² =
  16. 16.27² =
  17. 17.17² =
  18. 18.12² =
  19. 19.16² =
  20. 20.21² =
  21. 21.17² =
  22. 22.26² =
  23. 23.25² =
  24. 24.22² =
  25. 25.26² =
  26. 26.24² =
  27. 27.29² =
  28. 28.13² =
  29. 29.22² =
  30. 30.17² =
  31. 31.13² =
  32. 32.29² =
  33. 33.13² =
  34. 34.25² =
  35. 35.21² =
  36. 36.21² =
  37. 37.14² =
  38. 38.16² =
  39. 39.12² =
  40. 40.11² =

Answer key

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

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