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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 94 · 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. 1.19² =
  2. 2.28² =
  3. 3.13² =
  4. 4.11² =
  5. 5.17² =
  6. 6.16² =
  7. 7.22² =
  8. 8.27² =
  9. 9.29² =
  10. 10.26² =
  11. 11.25² =
  12. 12.15² =
  13. 13.14² =
  14. 14.21² =
  15. 15.23² =
  16. 16.24² =
  17. 17.18² =
  18. 18.23² =
  19. 19.12² =
  20. 20.15² =
  21. 21.21² =
  22. 22.12² =
  23. 23.12² =
  24. 24.27² =
  25. 25.28² =
  26. 26.11² =
  27. 27.24² =
  28. 28.12² =
  29. 29.14² =
  30. 30.13² =
  31. 31.22² =
  32. 32.21² =
  33. 33.16² =
  34. 34.24² =
  35. 35.21² =
  36. 36.21² =
  37. 37.26² =
  38. 38.29² =
  39. 39.24² =
  40. 40.13² =

Answer key

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

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