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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 104 · 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. 1.12² =
  2. 2.17² =
  3. 3.24² =
  4. 4.13² =
  5. 5.28² =
  6. 6.27² =
  7. 7.25² =
  8. 8.29² =
  9. 9.22² =
  10. 10.16² =
  11. 11.23² =
  12. 12.14² =
  13. 13.18² =
  14. 14.19² =
  15. 15.11² =
  16. 16.26² =
  17. 17.21² =
  18. 18.11² =
  19. 19.23² =
  20. 20.25² =
  21. 21.15² =
  22. 22.29² =
  23. 23.19² =
  24. 24.12² =
  25. 25.15² =
  26. 26.23² =
  27. 27.14² =
  28. 28.11² =
  29. 29.22² =
  30. 30.13² =
  31. 31.29² =
  32. 32.21² =
  33. 33.25² =
  34. 34.26² =
  35. 35.12² =
  36. 36.16² =
  37. 37.21² =
  38. 38.16² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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