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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 51 · 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. 1.15² =
  2. 2.17² =
  3. 3.24² =
  4. 4.28² =
  5. 5.11² =
  6. 6.22² =
  7. 7.26² =
  8. 8.12² =
  9. 9.18² =
  10. 10.27² =
  11. 11.13² =
  12. 12.23² =
  13. 13.25² =
  14. 14.19² =
  15. 15.16² =
  16. 16.14² =
  17. 17.16² =
  18. 18.29² =
  19. 19.21² =
  20. 20.25² =
  21. 21.21² =
  22. 22.17² =
  23. 23.16² =
  24. 24.14² =
  25. 25.11² =
  26. 26.19² =
  27. 27.19² =
  28. 28.23² =
  29. 29.24² =
  30. 30.11² =
  31. 31.21² =
  32. 32.14² =
  33. 33.25² =
  34. 34.22² =
  35. 35.12² =
  36. 36.13² =
  37. 37.13² =
  38. 38.24² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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