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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 647 · 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. 1.16² =
  2. 2.12² =
  3. 3.17² =
  4. 4.21² =
  5. 5.24² =
  6. 6.18² =
  7. 7.14² =
  8. 8.11² =
  9. 9.27² =
  10. 10.25² =
  11. 11.22² =
  12. 12.29² =
  13. 13.19² =
  14. 14.23² =
  15. 15.26² =
  16. 16.16² =
  17. 17.13² =
  18. 18.16² =
  19. 19.15² =
  20. 20.28² =
  21. 21.16² =
  22. 22.28² =
  23. 23.17² =
  24. 24.22² =
  25. 25.29² =
  26. 26.17² =
  27. 27.24² =
  28. 28.11² =
  29. 29.16² =
  30. 30.26² =
  31. 31.14² =
  32. 32.15² =
  33. 33.24² =
  34. 34.22² =
  35. 35.21² =
  36. 36.24² =
  37. 37.15² =
  38. 38.21² =
  39. 39.17² =
  40. 40.12² =

Answer key

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

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