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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 26 · 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. 2.23² =
  3. 3.21² =
  4. 4.29² =
  5. 5.13² =
  6. 6.27² =
  7. 7.15² =
  8. 8.22² =
  9. 9.19² =
  10. 10.26² =
  11. 11.24² =
  12. 12.11² =
  13. 13.16² =
  14. 14.28² =
  15. 15.17² =
  16. 16.21² =
  17. 17.24² =
  18. 18.14² =
  19. 19.18² =
  20. 20.13² =
  21. 21.29² =
  22. 22.29² =
  23. 23.16² =
  24. 24.25² =
  25. 25.15² =
  26. 26.24² =
  27. 27.17² =
  28. 28.22² =
  29. 29.21² =
  30. 30.14² =
  31. 31.25² =
  32. 32.11² =
  33. 33.12² =
  34. 34.27² =
  35. 35.27² =
  36. 36.13² =
  37. 37.15² =
  38. 38.16² =
  39. 39.16² =
  40. 40.22² =

Answer key

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

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