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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 16 · 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. 2.28² =
  3. 3.19² =
  4. 4.23² =
  5. 5.18² =
  6. 6.25² =
  7. 7.12² =
  8. 8.29² =
  9. 9.13² =
  10. 10.11² =
  11. 11.16² =
  12. 12.24² =
  13. 13.17² =
  14. 14.21² =
  15. 15.27² =
  16. 16.22² =
  17. 17.13² =
  18. 18.26² =
  19. 19.21² =
  20. 20.14² =
  21. 21.29² =
  22. 22.14² =
  23. 23.11² =
  24. 24.15² =
  25. 25.23² =
  26. 26.15² =
  27. 27.13² =
  28. 28.29² =
  29. 29.13² =
  30. 30.18² =
  31. 31.16² =
  32. 32.17² =
  33. 33.28² =
  34. 34.22² =
  35. 35.17² =
  36. 36.25² =
  37. 37.15² =
  38. 38.14² =
  39. 39.26² =
  40. 40.15² =

Answer key

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

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