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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 180 · 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. 1.11² =
  2. 2.19² =
  3. 3.16² =
  4. 4.18² =
  5. 5.15² =
  6. 6.23² =
  7. 7.29² =
  8. 8.22² =
  9. 9.12² =
  10. 10.28² =
  11. 11.24² =
  12. 12.26² =
  13. 13.21² =
  14. 14.14² =
  15. 15.27² =
  16. 16.17² =
  17. 17.13² =
  18. 18.25² =
  19. 19.12² =
  20. 20.14² =
  21. 21.13² =
  22. 22.19² =
  23. 23.13² =
  24. 24.28² =
  25. 25.25² =
  26. 26.14² =
  27. 27.17² =
  28. 28.11² =
  29. 29.28² =
  30. 30.18² =
  31. 31.28² =
  32. 32.15² =
  33. 33.22² =
  34. 34.27² =
  35. 35.21² =
  36. 36.17² =
  37. 37.24² =
  38. 38.24² =
  39. 39.17² =
  40. 40.15² =

Answer key

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

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