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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 324 · 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. 2.29² =
  3. 3.25² =
  4. 4.17² =
  5. 5.28² =
  6. 6.26² =
  7. 7.21² =
  8. 8.12² =
  9. 9.15² =
  10. 10.16² =
  11. 11.22² =
  12. 12.24² =
  13. 13.11² =
  14. 14.27² =
  15. 15.23² =
  16. 16.13² =
  17. 17.19² =
  18. 18.29² =
  19. 19.18² =
  20. 20.21² =
  21. 21.22² =
  22. 22.24² =
  23. 23.21² =
  24. 24.26² =
  25. 25.29² =
  26. 26.25² =
  27. 27.22² =
  28. 28.21² =
  29. 29.15² =
  30. 30.21² =
  31. 31.22² =
  32. 32.26² =
  33. 33.18² =
  34. 34.21² =
  35. 35.21² =
  36. 36.19² =
  37. 37.12² =
  38. 38.11² =
  39. 39.13² =
  40. 40.14² =

Answer key

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

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