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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 600 · 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. 2.24² =
  3. 3.13² =
  4. 4.22² =
  5. 5.21² =
  6. 6.25² =
  7. 7.11² =
  8. 8.29² =
  9. 9.26² =
  10. 10.28² =
  11. 11.23² =
  12. 12.16² =
  13. 13.27² =
  14. 14.12² =
  15. 15.17² =
  16. 16.15² =
  17. 17.17² =
  18. 18.18² =
  19. 19.19² =
  20. 20.15² =
  21. 21.14² =
  22. 22.18² =
  23. 23.23² =
  24. 24.19² =
  25. 25.25² =
  26. 26.12² =
  27. 27.21² =
  28. 28.23² =
  29. 29.18² =
  30. 30.11² =
  31. 31.15² =
  32. 32.24² =
  33. 33.22² =
  34. 34.22² =
  35. 35.15² =
  36. 36.15² =
  37. 37.26² =
  38. 38.27² =
  39. 39.12² =
  40. 40.22² =

Answer key

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

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