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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 768 · 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. 1.18² =
  2. 2.16² =
  3. 3.22² =
  4. 4.15² =
  5. 5.21² =
  6. 6.29² =
  7. 7.23² =
  8. 8.13² =
  9. 9.25² =
  10. 10.17² =
  11. 11.14² =
  12. 12.19² =
  13. 13.24² =
  14. 14.28² =
  15. 15.11² =
  16. 16.26² =
  17. 17.27² =
  18. 18.12² =
  19. 19.21² =
  20. 20.17² =
  21. 21.21² =
  22. 22.15² =
  23. 23.12² =
  24. 24.29² =
  25. 25.22² =
  26. 26.17² =
  27. 27.23² =
  28. 28.12² =
  29. 29.24² =
  30. 30.11² =
  31. 31.11² =
  32. 32.19² =
  33. 33.12² =
  34. 34.26² =
  35. 35.12² =
  36. 36.19² =
  37. 37.24² =
  38. 38.25² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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