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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 417 · 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. 3.21² =
  4. 4.27² =
  5. 5.25² =
  6. 6.15² =
  7. 7.12² =
  8. 8.23² =
  9. 9.17² =
  10. 10.13² =
  11. 11.11² =
  12. 12.14² =
  13. 13.28² =
  14. 14.21² =
  15. 15.26² =
  16. 16.22² =
  17. 17.29² =
  18. 18.16² =
  19. 19.18² =
  20. 20.24² =
  21. 21.15² =
  22. 22.17² =
  23. 23.21² =
  24. 24.24² =
  25. 25.21² =
  26. 26.13² =
  27. 27.29² =
  28. 28.22² =
  29. 29.11² =
  30. 30.21² =
  31. 31.12² =
  32. 32.13² =
  33. 33.22² =
  34. 34.19² =
  35. 35.18² =
  36. 36.22² =
  37. 37.21² =
  38. 38.18² =
  39. 39.27² =
  40. 40.11² =

Answer key

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

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