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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 770 · 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. 3.28² =
  4. 4.21² =
  5. 5.27² =
  6. 6.16² =
  7. 7.24² =
  8. 8.25² =
  9. 9.18² =
  10. 10.13² =
  11. 11.14² =
  12. 12.17² =
  13. 13.26² =
  14. 14.15² =
  15. 15.11² =
  16. 16.23² =
  17. 17.25² =
  18. 18.22² =
  19. 19.12² =
  20. 20.16² =
  21. 21.27² =
  22. 22.21² =
  23. 23.17² =
  24. 24.29² =
  25. 25.26² =
  26. 26.23² =
  27. 27.22² =
  28. 28.18² =
  29. 29.25² =
  30. 30.21² =
  31. 31.21² =
  32. 32.29² =
  33. 33.15² =
  34. 34.27² =
  35. 35.19² =
  36. 36.29² =
  37. 37.22² =
  38. 38.18² =
  39. 39.15² =
  40. 40.12² =

Answer key

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

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