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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 403 · 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. 1.14² =
  2. 2.12² =
  3. 3.26² =
  4. 4.22² =
  5. 5.17² =
  6. 6.24² =
  7. 7.16² =
  8. 8.21² =
  9. 9.29² =
  10. 10.11² =
  11. 11.18² =
  12. 12.23² =
  13. 13.27² =
  14. 14.19² =
  15. 15.15² =
  16. 16.13² =
  17. 17.28² =
  18. 18.15² =
  19. 19.15² =
  20. 20.25² =
  21. 21.12² =
  22. 22.28² =
  23. 23.15² =
  24. 24.14² =
  25. 25.13² =
  26. 26.21² =
  27. 27.24² =
  28. 28.19² =
  29. 29.19² =
  30. 30.24² =
  31. 31.22² =
  32. 32.14² =
  33. 33.27² =
  34. 34.11² =
  35. 35.24² =
  36. 36.11² =
  37. 37.23² =
  38. 38.22² =
  39. 39.15² =
  40. 40.27² =

Answer key

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

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