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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 794 · 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. 1.19² =
  2. 2.29² =
  3. 3.14² =
  4. 4.27² =
  5. 5.12² =
  6. 6.11² =
  7. 7.18² =
  8. 8.26² =
  9. 9.16² =
  10. 10.24² =
  11. 11.25² =
  12. 12.28² =
  13. 13.21² =
  14. 14.13² =
  15. 15.23² =
  16. 16.21² =
  17. 17.15² =
  18. 18.29² =
  19. 19.25² =
  20. 20.24² =
  21. 21.17² =
  22. 22.11² =
  23. 23.22² =
  24. 24.11² =
  25. 25.22² =
  26. 26.17² =
  27. 27.21² =
  28. 28.12² =
  29. 29.14² =
  30. 30.22² =
  31. 31.29² =
  32. 32.14² =
  33. 33.25² =
  34. 34.29² =
  35. 35.19² =
  36. 36.22² =
  37. 37.24² =
  38. 38.12² =
  39. 39.13² =
  40. 40.21² =

Answer key

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

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