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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 35 · 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. 1.15² =
  2. 2.21² =
  3. 3.14² =
  4. 4.26² =
  5. 5.28² =
  6. 6.23² =
  7. 7.12² =
  8. 8.17² =
  9. 9.16² =
  10. 10.11² =
  11. 11.19² =
  12. 12.24² =
  13. 13.22² =
  14. 14.25² =
  15. 15.13² =
  16. 16.18² =
  17. 17.29² =
  18. 18.27² =
  19. 19.12² =
  20. 20.28² =
  21. 21.19² =
  22. 22.24² =
  23. 23.21² =
  24. 24.11² =
  25. 25.12² =
  26. 26.19² =
  27. 27.19² =
  28. 28.11² =
  29. 29.11² =
  30. 30.13² =
  31. 31.29² =
  32. 32.14² =
  33. 33.25² =
  34. 34.26² =
  35. 35.11² =
  36. 36.29² =
  37. 37.15² =
  38. 38.15² =
  39. 39.27² =
  40. 40.11² =

Answer key

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

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