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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 407 · 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. 1.26² =
  2. 2.18² =
  3. 3.15² =
  4. 4.28² =
  5. 5.13² =
  6. 6.29² =
  7. 7.12² =
  8. 8.19² =
  9. 9.16² =
  10. 10.22² =
  11. 11.24² =
  12. 12.27² =
  13. 13.17² =
  14. 14.21² =
  15. 15.11² =
  16. 16.23² =
  17. 17.25² =
  18. 18.18² =
  19. 19.14² =
  20. 20.17² =
  21. 21.13² =
  22. 22.19² =
  23. 23.22² =
  24. 24.14² =
  25. 25.21² =
  26. 26.16² =
  27. 27.22² =
  28. 28.13² =
  29. 29.13² =
  30. 30.15² =
  31. 31.21² =
  32. 32.13² =
  33. 33.27² =
  34. 34.15² =
  35. 35.21² =
  36. 36.21² =
  37. 37.16² =
  38. 38.22² =
  39. 39.12² =
  40. 40.14² =

Answer key

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

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