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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 285 · 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. 1.21² =
  2. 2.28² =
  3. 3.14² =
  4. 4.29² =
  5. 5.11² =
  6. 6.15² =
  7. 7.25² =
  8. 8.19² =
  9. 9.12² =
  10. 10.27² =
  11. 11.23² =
  12. 12.24² =
  13. 13.13² =
  14. 14.22² =
  15. 15.29² =
  16. 16.27² =
  17. 17.17² =
  18. 18.16² =
  19. 19.26² =
  20. 20.22² =
  21. 21.22² =
  22. 22.25² =
  23. 23.18² =
  24. 24.12² =
  25. 25.11² =
  26. 26.14² =
  27. 27.17² =
  28. 28.14² =
  29. 29.21² =
  30. 30.29² =
  31. 31.14² =
  32. 32.21² =
  33. 33.21² =
  34. 34.19² =
  35. 35.28² =
  36. 36.19² =
  37. 37.13² =
  38. 38.16² =
  39. 39.13² =
  40. 40.27² =

Answer key

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

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