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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 63 · 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. 1.17² =
  2. 2.27² =
  3. 3.13² =
  4. 4.18² =
  5. 5.24² =
  6. 6.25² =
  7. 7.19² =
  8. 8.26² =
  9. 9.28² =
  10. 10.16² =
  11. 11.11² =
  12. 12.29² =
  13. 13.21² =
  14. 14.23² =
  15. 15.14² =
  16. 16.22² =
  17. 17.29² =
  18. 18.23² =
  19. 19.15² =
  20. 20.12² =
  21. 21.12² =
  22. 22.11² =
  23. 23.29² =
  24. 24.21² =
  25. 25.18² =
  26. 26.13² =
  27. 27.21² =
  28. 28.25² =
  29. 29.12² =
  30. 30.13² =
  31. 31.12² =
  32. 32.14² =
  33. 33.13² =
  34. 34.13² =
  35. 35.16² =
  36. 36.23² =
  37. 37.12² =
  38. 38.24² =
  39. 39.27² =
  40. 40.27² =

Answer key

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

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