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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 87 · 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. 2.15² =
  3. 3.26² =
  4. 4.12² =
  5. 5.27² =
  6. 6.21² =
  7. 7.18² =
  8. 8.29² =
  9. 9.13² =
  10. 10.22² =
  11. 11.17² =
  12. 12.16² =
  13. 13.11² =
  14. 14.28² =
  15. 15.24² =
  16. 16.19² =
  17. 17.25² =
  18. 18.25² =
  19. 19.19² =
  20. 20.23² =
  21. 21.12² =
  22. 22.29² =
  23. 23.16² =
  24. 24.11² =
  25. 25.21² =
  26. 26.12² =
  27. 27.14² =
  28. 28.29² =
  29. 29.15² =
  30. 30.15² =
  31. 31.15² =
  32. 32.19² =
  33. 33.12² =
  34. 34.12² =
  35. 35.11² =
  36. 36.22² =
  37. 37.25² =
  38. 38.12² =
  39. 39.19² =
  40. 40.12² =

Answer key

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

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