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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 152 · 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. 2.18² =
  3. 3.19² =
  4. 4.23² =
  5. 5.12² =
  6. 6.17² =
  7. 7.26² =
  8. 8.14² =
  9. 9.22² =
  10. 10.25² =
  11. 11.21² =
  12. 12.11² =
  13. 13.27² =
  14. 14.28² =
  15. 15.24² =
  16. 16.21² =
  17. 17.15² =
  18. 18.29² =
  19. 19.22² =
  20. 20.28² =
  21. 21.21² =
  22. 22.21² =
  23. 23.15² =
  24. 24.13² =
  25. 25.24² =
  26. 26.18² =
  27. 27.18² =
  28. 28.28² =
  29. 29.17² =
  30. 30.29² =
  31. 31.11² =
  32. 32.11² =
  33. 33.16² =
  34. 34.16² =
  35. 35.22² =
  36. 36.12² =
  37. 37.26² =
  38. 38.23² =
  39. 39.17² =
  40. 40.12² =

Answer key

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

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