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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 787 · 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. 1.17² =
  2. 2.26² =
  3. 3.11² =
  4. 4.16² =
  5. 5.27² =
  6. 6.24² =
  7. 7.12² =
  8. 8.19² =
  9. 9.14² =
  10. 10.25² =
  11. 11.23² =
  12. 12.15² =
  13. 13.28² =
  14. 14.21² =
  15. 15.13² =
  16. 16.29² =
  17. 17.13² =
  18. 18.24² =
  19. 19.22² =
  20. 20.18² =
  21. 21.13² =
  22. 22.23² =
  23. 23.19² =
  24. 24.26² =
  25. 25.23² =
  26. 26.21² =
  27. 27.24² =
  28. 28.25² =
  29. 29.17² =
  30. 30.13² =
  31. 31.28² =
  32. 32.16² =
  33. 33.23² =
  34. 34.16² =
  35. 35.27² =
  36. 36.11² =
  37. 37.21² =
  38. 38.26² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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