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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 665 · 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. 1.15² =
  2. 2.28² =
  3. 3.25² =
  4. 4.27² =
  5. 5.19² =
  6. 6.14² =
  7. 7.12² =
  8. 8.29² =
  9. 9.23² =
  10. 10.21² =
  11. 11.22² =
  12. 12.18² =
  13. 13.26² =
  14. 14.24² =
  15. 15.16² =
  16. 16.11² =
  17. 17.21² =
  18. 18.17² =
  19. 19.12² =
  20. 20.28² =
  21. 21.11² =
  22. 22.11² =
  23. 23.13² =
  24. 24.14² =
  25. 25.29² =
  26. 26.24² =
  27. 27.19² =
  28. 28.24² =
  29. 29.22² =
  30. 30.11² =
  31. 31.14² =
  32. 32.21² =
  33. 33.24² =
  34. 34.25² =
  35. 35.28² =
  36. 36.13² =
  37. 37.11² =
  38. 38.24² =
  39. 39.23² =
  40. 40.24² =

Answer key

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

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