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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 577 · 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. 1.23² =
  2. 2.11² =
  3. 3.24² =
  4. 4.26² =
  5. 5.27² =
  6. 6.19² =
  7. 7.18² =
  8. 8.17² =
  9. 9.29² =
  10. 10.13² =
  11. 11.21² =
  12. 12.25² =
  13. 13.16² =
  14. 14.28² =
  15. 15.14² =
  16. 16.22² =
  17. 17.13² =
  18. 18.15² =
  19. 19.14² =
  20. 20.12² =
  21. 21.27² =
  22. 22.23² =
  23. 23.19² =
  24. 24.16² =
  25. 25.26² =
  26. 26.21² =
  27. 27.23² =
  28. 28.16² =
  29. 29.21² =
  30. 30.26² =
  31. 31.16² =
  32. 32.21² =
  33. 33.26² =
  34. 34.25² =
  35. 35.17² =
  36. 36.28² =
  37. 37.29² =
  38. 38.19² =
  39. 39.25² =
  40. 40.12² =

Answer key

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

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