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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 776 · 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. 1.28² =
  2. 2.16² =
  3. 3.27² =
  4. 4.26² =
  5. 5.22² =
  6. 6.14² =
  7. 7.11² =
  8. 8.21² =
  9. 9.15² =
  10. 10.29² =
  11. 11.25² =
  12. 12.24² =
  13. 13.11² =
  14. 14.12² =
  15. 15.19² =
  16. 16.23² =
  17. 17.13² =
  18. 18.17² =
  19. 19.18² =
  20. 20.26² =
  21. 21.11² =
  22. 22.18² =
  23. 23.27² =
  24. 24.23² =
  25. 25.24² =
  26. 26.19² =
  27. 27.26² =
  28. 28.25² =
  29. 29.12² =
  30. 30.11² =
  31. 31.14² =
  32. 32.24² =
  33. 33.26² =
  34. 34.29² =
  35. 35.16² =
  36. 36.15² =
  37. 37.23² =
  38. 38.23² =
  39. 39.17² =
  40. 40.17² =

Answer key

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

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