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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 669 · 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. 2.22² =
  3. 3.19² =
  4. 4.21² =
  5. 5.26² =
  6. 6.11² =
  7. 7.29² =
  8. 8.24² =
  9. 9.14² =
  10. 10.15² =
  11. 11.18² =
  12. 12.27² =
  13. 13.17² =
  14. 14.28² =
  15. 15.16² =
  16. 16.25² =
  17. 17.26² =
  18. 18.21² =
  19. 19.13² =
  20. 20.23² =
  21. 21.15² =
  22. 22.13² =
  23. 23.17² =
  24. 24.22² =
  25. 25.21² =
  26. 26.25² =
  27. 27.19² =
  28. 28.27² =
  29. 29.14² =
  30. 30.21² =
  31. 31.13² =
  32. 32.16² =
  33. 33.22² =
  34. 34.28² =
  35. 35.27² =
  36. 36.22² =
  37. 37.25² =
  38. 38.28² =
  39. 39.24² =
  40. 40.14² =

Answer key

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

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