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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 355 · 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. 2.22² =
  3. 3.28² =
  4. 4.11² =
  5. 5.13² =
  6. 6.27² =
  7. 7.14² =
  8. 8.23² =
  9. 9.12² =
  10. 10.15² =
  11. 11.21² =
  12. 12.19² =
  13. 13.24² =
  14. 14.17² =
  15. 15.18² =
  16. 16.26² =
  17. 17.25² =
  18. 18.29² =
  19. 19.23² =
  20. 20.27² =
  21. 21.21² =
  22. 22.13² =
  23. 23.23² =
  24. 24.13² =
  25. 25.19² =
  26. 26.21² =
  27. 27.24² =
  28. 28.13² =
  29. 29.13² =
  30. 30.18² =
  31. 31.15² =
  32. 32.13² =
  33. 33.26² =
  34. 34.17² =
  35. 35.13² =
  36. 36.21² =
  37. 37.28² =
  38. 38.21² =
  39. 39.29² =
  40. 40.19² =

Answer key

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

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