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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 222 · 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. 1.17² =
  2. 2.26² =
  3. 3.11² =
  4. 4.19² =
  5. 5.21² =
  6. 6.14² =
  7. 7.16² =
  8. 8.15² =
  9. 9.13² =
  10. 10.25² =
  11. 11.23² =
  12. 12.28² =
  13. 13.29² =
  14. 14.27² =
  15. 15.18² =
  16. 16.27² =
  17. 17.22² =
  18. 18.12² =
  19. 19.24² =
  20. 20.29² =
  21. 21.15² =
  22. 22.24² =
  23. 23.21² =
  24. 24.11² =
  25. 25.23² =
  26. 26.29² =
  27. 27.11² =
  28. 28.24² =
  29. 29.23² =
  30. 30.28² =
  31. 31.16² =
  32. 32.19² =
  33. 33.15² =
  34. 34.14² =
  35. 35.26² =
  36. 36.21² =
  37. 37.22² =
  38. 38.22² =
  39. 39.19² =
  40. 40.27² =

Answer key

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

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