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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 734 · 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. 2.25² =
  3. 3.23² =
  4. 4.11² =
  5. 5.19² =
  6. 6.16² =
  7. 7.28² =
  8. 8.24² =
  9. 9.27² =
  10. 10.14² =
  11. 11.15² =
  12. 12.18² =
  13. 13.13² =
  14. 14.17² =
  15. 15.29² =
  16. 16.21² =
  17. 17.22² =
  18. 18.26² =
  19. 19.15² =
  20. 20.13² =
  21. 21.15² =
  22. 22.11² =
  23. 23.24² =
  24. 24.16² =
  25. 25.18² =
  26. 26.22² =
  27. 27.23² =
  28. 28.15² =
  29. 29.12² =
  30. 30.22² =
  31. 31.17² =
  32. 32.11² =
  33. 33.12² =
  34. 34.25² =
  35. 35.21² =
  36. 36.27² =
  37. 37.24² =
  38. 38.13² =
  39. 39.17² =
  40. 40.14² =

Answer key

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

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