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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 880 · 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. 1.24² =
  2. 2.23² =
  3. 3.19² =
  4. 4.14² =
  5. 5.16² =
  6. 6.13² =
  7. 7.25² =
  8. 8.17² =
  9. 9.26² =
  10. 10.18² =
  11. 11.29² =
  12. 12.15² =
  13. 13.27² =
  14. 14.21² =
  15. 15.28² =
  16. 16.22² =
  17. 17.15² =
  18. 18.12² =
  19. 19.11² =
  20. 20.25² =
  21. 21.24² =
  22. 22.25² =
  23. 23.11² =
  24. 24.12² =
  25. 25.24² =
  26. 26.18² =
  27. 27.21² =
  28. 28.21² =
  29. 29.29² =
  30. 30.21² =
  31. 31.14² =
  32. 32.24² =
  33. 33.24² =
  34. 34.12² =
  35. 35.18² =
  36. 36.12² =
  37. 37.23² =
  38. 38.27² =
  39. 39.23² =
  40. 40.14² =

Answer key

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

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