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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 597 · 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. 1.21² =
  2. 2.23² =
  3. 3.24² =
  4. 4.27² =
  5. 5.14² =
  6. 6.29² =
  7. 7.26² =
  8. 8.25² =
  9. 9.17² =
  10. 10.22² =
  11. 11.15² =
  12. 12.28² =
  13. 13.16² =
  14. 14.19² =
  15. 15.18² =
  16. 16.11² =
  17. 17.13² =
  18. 18.12² =
  19. 19.22² =
  20. 20.18² =
  21. 21.29² =
  22. 22.19² =
  23. 23.23² =
  24. 24.25² =
  25. 25.19² =
  26. 26.29² =
  27. 27.21² =
  28. 28.22² =
  29. 29.25² =
  30. 30.12² =
  31. 31.21² =
  32. 32.21² =
  33. 33.12² =
  34. 34.25² =
  35. 35.13² =
  36. 36.22² =
  37. 37.29² =
  38. 38.14² =
  39. 39.27² =
  40. 40.25² =

Answer key

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

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