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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 421 · 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. 1.19² =
  2. 2.21² =
  3. 3.13² =
  4. 4.11² =
  5. 5.22² =
  6. 6.12² =
  7. 7.18² =
  8. 8.14² =
  9. 9.26² =
  10. 10.23² =
  11. 11.16² =
  12. 12.24² =
  13. 13.15² =
  14. 14.27² =
  15. 15.17² =
  16. 16.29² =
  17. 17.29² =
  18. 18.21² =
  19. 19.12² =
  20. 20.14² =
  21. 21.28² =
  22. 22.24² =
  23. 23.25² =
  24. 24.14² =
  25. 25.19² =
  26. 26.23² =
  27. 27.23² =
  28. 28.18² =
  29. 29.19² =
  30. 30.13² =
  31. 31.17² =
  32. 32.11² =
  33. 33.21² =
  34. 34.15² =
  35. 35.25² =
  36. 36.19² =
  37. 37.22² =
  38. 38.27² =
  39. 39.16² =
  40. 40.29² =

Answer key

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

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