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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 497 · 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. 2.16² =
  3. 3.11² =
  4. 4.13² =
  5. 5.28² =
  6. 6.22² =
  7. 7.18² =
  8. 8.21² =
  9. 9.17² =
  10. 10.23² =
  11. 11.26² =
  12. 12.19² =
  13. 13.15² =
  14. 14.14² =
  15. 15.21² =
  16. 16.29² =
  17. 17.27² =
  18. 18.25² =
  19. 19.29² =
  20. 20.24² =
  21. 21.23² =
  22. 22.19² =
  23. 23.24² =
  24. 24.15² =
  25. 25.28² =
  26. 26.25² =
  27. 27.13² =
  28. 28.11² =
  29. 29.27² =
  30. 30.18² =
  31. 31.11² =
  32. 32.14² =
  33. 33.14² =
  34. 34.22² =
  35. 35.14² =
  36. 36.14² =
  37. 37.21² =
  38. 38.15² =
  39. 39.13² =
  40. 40.29² =

Answer key

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

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