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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 5 · 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. 1.25² =
  2. 2.12² =
  3. 3.23² =
  4. 4.13² =
  5. 5.15² =
  6. 6.16² =
  7. 7.21² =
  8. 8.22² =
  9. 9.18² =
  10. 10.19² =
  11. 11.26² =
  12. 12.11² =
  13. 13.17² =
  14. 14.24² =
  15. 15.29² =
  16. 16.14² =
  17. 17.27² =
  18. 18.28² =
  19. 19.13² =
  20. 20.29² =
  21. 21.12² =
  22. 22.29² =
  23. 23.21² =
  24. 24.21² =
  25. 25.14² =
  26. 26.16² =
  27. 27.16² =
  28. 28.14² =
  29. 29.24² =
  30. 30.13² =
  31. 31.17² =
  32. 32.25² =
  33. 33.19² =
  34. 34.22² =
  35. 35.12² =
  36. 36.29² =
  37. 37.27² =
  38. 38.28² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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