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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 347 · 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. 1.12² =
  2. 2.25² =
  3. 3.26² =
  4. 4.18² =
  5. 5.16² =
  6. 6.11² =
  7. 7.28² =
  8. 8.15² =
  9. 9.23² =
  10. 10.22² =
  11. 11.17² =
  12. 12.14² =
  13. 13.29² =
  14. 14.13² =
  15. 15.21² =
  16. 16.11² =
  17. 17.24² =
  18. 18.16² =
  19. 19.19² =
  20. 20.27² =
  21. 21.13² =
  22. 22.15² =
  23. 23.15² =
  24. 24.14² =
  25. 25.24² =
  26. 26.25² =
  27. 27.22² =
  28. 28.17² =
  29. 29.26² =
  30. 30.12² =
  31. 31.21² =
  32. 32.21² =
  33. 33.23² =
  34. 34.28² =
  35. 35.19² =
  36. 36.22² =
  37. 37.22² =
  38. 38.21² =
  39. 39.14² =
  40. 40.23² =

Answer key

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

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