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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 602 · 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. 3.12² =
  4. 4.11² =
  5. 5.27² =
  6. 6.13² =
  7. 7.21² =
  8. 8.24² =
  9. 9.28² =
  10. 10.26² =
  11. 11.15² =
  12. 12.14² =
  13. 13.23² =
  14. 14.16² =
  15. 15.22² =
  16. 16.18² =
  17. 17.17² =
  18. 18.25² =
  19. 19.13² =
  20. 20.15² =
  21. 21.21² =
  22. 22.21² =
  23. 23.28² =
  24. 24.24² =
  25. 25.15² =
  26. 26.16² =
  27. 27.25² =
  28. 28.26² =
  29. 29.26² =
  30. 30.24² =
  31. 31.12² =
  32. 32.12² =
  33. 33.25² =
  34. 34.13² =
  35. 35.17² =
  36. 36.13² =
  37. 37.22² =
  38. 38.13² =
  39. 39.19² =
  40. 40.19² =

Answer key

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

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