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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 571 · 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. 1.24² =
  2. 2.22² =
  3. 3.23² =
  4. 4.13² =
  5. 5.12² =
  6. 6.25² =
  7. 7.21² =
  8. 8.29² =
  9. 9.11² =
  10. 10.17² =
  11. 11.28² =
  12. 12.26² =
  13. 13.19² =
  14. 14.27² =
  15. 15.18² =
  16. 16.15² =
  17. 17.14² =
  18. 18.16² =
  19. 19.16² =
  20. 20.22² =
  21. 21.28² =
  22. 22.21² =
  23. 23.28² =
  24. 24.27² =
  25. 25.12² =
  26. 26.11² =
  27. 27.27² =
  28. 28.28² =
  29. 29.15² =
  30. 30.23² =
  31. 31.14² =
  32. 32.11² =
  33. 33.25² =
  34. 34.17² =
  35. 35.27² =
  36. 36.26² =
  37. 37.14² =
  38. 38.13² =
  39. 39.18² =
  40. 40.13² =

Answer key

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

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