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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 751 · 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. 1.19² =
  2. 2.23² =
  3. 3.17² =
  4. 4.14² =
  5. 5.21² =
  6. 6.22² =
  7. 7.15² =
  8. 8.29² =
  9. 9.24² =
  10. 10.18² =
  11. 11.16² =
  12. 12.25² =
  13. 13.11² =
  14. 14.28² =
  15. 15.27² =
  16. 16.13² =
  17. 17.12² =
  18. 18.26² =
  19. 19.28² =
  20. 20.27² =
  21. 21.19² =
  22. 22.22² =
  23. 23.16² =
  24. 24.22² =
  25. 25.12² =
  26. 26.15² =
  27. 27.12² =
  28. 28.21² =
  29. 29.23² =
  30. 30.28² =
  31. 31.27² =
  32. 32.17² =
  33. 33.21² =
  34. 34.14² =
  35. 35.27² =
  36. 36.12² =
  37. 37.13² =
  38. 38.21² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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