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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 259 · 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. 2.22² =
  3. 3.14² =
  4. 4.17² =
  5. 5.28² =
  6. 6.21² =
  7. 7.27² =
  8. 8.15² =
  9. 9.25² =
  10. 10.24² =
  11. 11.12² =
  12. 12.29² =
  13. 13.13² =
  14. 14.18² =
  15. 15.26² =
  16. 16.11² =
  17. 17.23² =
  18. 18.16² =
  19. 19.25² =
  20. 20.26² =
  21. 21.15² =
  22. 22.19² =
  23. 23.23² =
  24. 24.15² =
  25. 25.11² =
  26. 26.23² =
  27. 27.25² =
  28. 28.25² =
  29. 29.26² =
  30. 30.29² =
  31. 31.15² =
  32. 32.25² =
  33. 33.22² =
  34. 34.21² =
  35. 35.23² =
  36. 36.23² =
  37. 37.21² =
  38. 38.19² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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