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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 354 · 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. 1.16² =
  2. 2.14² =
  3. 3.12² =
  4. 4.19² =
  5. 5.13² =
  6. 6.24² =
  7. 7.17² =
  8. 8.29² =
  9. 9.21² =
  10. 10.26² =
  11. 11.22² =
  12. 12.15² =
  13. 13.18² =
  14. 14.11² =
  15. 15.25² =
  16. 16.28² =
  17. 17.23² =
  18. 18.27² =
  19. 19.18² =
  20. 20.26² =
  21. 21.12² =
  22. 22.15² =
  23. 23.17² =
  24. 24.17² =
  25. 25.12² =
  26. 26.23² =
  27. 27.27² =
  28. 28.14² =
  29. 29.24² =
  30. 30.28² =
  31. 31.17² =
  32. 32.24² =
  33. 33.13² =
  34. 34.11² =
  35. 35.21² =
  36. 36.11² =
  37. 37.17² =
  38. 38.25² =
  39. 39.19² =
  40. 40.24² =

Answer key

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

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