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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 540 · 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. 1.25² =
  2. 2.15² =
  3. 3.23² =
  4. 4.19² =
  5. 5.28² =
  6. 6.14² =
  7. 7.13² =
  8. 8.11² =
  9. 9.21² =
  10. 10.17² =
  11. 11.27² =
  12. 12.22² =
  13. 13.24² =
  14. 14.29² =
  15. 15.16² =
  16. 16.16² =
  17. 17.12² =
  18. 18.18² =
  19. 19.25² =
  20. 20.26² =
  21. 21.22² =
  22. 22.23² =
  23. 23.27² =
  24. 24.25² =
  25. 25.28² =
  26. 26.22² =
  27. 27.28² =
  28. 28.22² =
  29. 29.11² =
  30. 30.17² =
  31. 31.28² =
  32. 32.23² =
  33. 33.24² =
  34. 34.13² =
  35. 35.12² =
  36. 36.21² =
  37. 37.15² =
  38. 38.21² =
  39. 39.14² =
  40. 40.27² =

Answer key

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

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