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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 685 · 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. 2.25² =
  3. 3.14² =
  4. 4.28² =
  5. 5.11² =
  6. 6.24² =
  7. 7.19² =
  8. 8.22² =
  9. 9.21² =
  10. 10.16² =
  11. 11.29² =
  12. 12.27² =
  13. 13.15² =
  14. 14.18² =
  15. 15.13² =
  16. 16.19² =
  17. 17.17² =
  18. 18.25² =
  19. 19.23² =
  20. 20.26² =
  21. 21.25² =
  22. 22.15² =
  23. 23.21² =
  24. 24.12² =
  25. 25.15² =
  26. 26.18² =
  27. 27.11² =
  28. 28.21² =
  29. 29.29² =
  30. 30.23² =
  31. 31.13² =
  32. 32.29² =
  33. 33.25² =
  34. 34.15² =
  35. 35.12² =
  36. 36.22² =
  37. 37.27² =
  38. 38.18² =
  39. 39.18² =
  40. 40.27² =

Answer key

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

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