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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 754 · 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. 1.17² =
  2. 2.29² =
  3. 3.24² =
  4. 4.12² =
  5. 5.11² =
  6. 6.26² =
  7. 7.23² =
  8. 8.15² =
  9. 9.14² =
  10. 10.19² =
  11. 11.16² =
  12. 12.25² =
  13. 13.27² =
  14. 14.28² =
  15. 15.13² =
  16. 16.21² =
  17. 17.14² =
  18. 18.18² =
  19. 19.14² =
  20. 20.22² =
  21. 21.17² =
  22. 22.15² =
  23. 23.21² =
  24. 24.25² =
  25. 25.17² =
  26. 26.13² =
  27. 27.23² =
  28. 28.15² =
  29. 29.18² =
  30. 30.12² =
  31. 31.16² =
  32. 32.12² =
  33. 33.28² =
  34. 34.11² =
  35. 35.22² =
  36. 36.23² =
  37. 37.18² =
  38. 38.22² =
  39. 39.24² =
  40. 40.12² =

Answer key

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

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