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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 545 · 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. 1.14² =
  2. 2.21² =
  3. 3.28² =
  4. 4.22² =
  5. 5.12² =
  6. 6.25² =
  7. 7.13² =
  8. 8.27² =
  9. 9.24² =
  10. 10.23² =
  11. 11.19² =
  12. 12.26² =
  13. 13.16² =
  14. 14.15² =
  15. 15.17² =
  16. 16.18² =
  17. 17.11² =
  18. 18.13² =
  19. 19.27² =
  20. 20.19² =
  21. 21.23² =
  22. 22.29² =
  23. 23.26² =
  24. 24.27² =
  25. 25.11² =
  26. 26.21² =
  27. 27.13² =
  28. 28.21² =
  29. 29.21² =
  30. 30.26² =
  31. 31.12² =
  32. 32.12² =
  33. 33.25² =
  34. 34.12² =
  35. 35.16² =
  36. 36.13² =
  37. 37.24² =
  38. 38.27² =
  39. 39.25² =
  40. 40.11² =

Answer key

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

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