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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 163 · 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. 1.28² =
  2. 2.18² =
  3. 3.16² =
  4. 4.22² =
  5. 5.17² =
  6. 6.25² =
  7. 7.21² =
  8. 8.11² =
  9. 9.19² =
  10. 10.26² =
  11. 11.24² =
  12. 12.12² =
  13. 13.23² =
  14. 14.15² =
  15. 15.13² =
  16. 16.14² =
  17. 17.29² =
  18. 18.27² =
  19. 19.17² =
  20. 20.27² =
  21. 21.22² =
  22. 22.25² =
  23. 23.19² =
  24. 24.21² =
  25. 25.17² =
  26. 26.13² =
  27. 27.23² =
  28. 28.15² =
  29. 29.14² =
  30. 30.12² =
  31. 31.24² =
  32. 32.11² =
  33. 33.16² =
  34. 34.12² =
  35. 35.17² =
  36. 36.14² =
  37. 37.21² =
  38. 38.29² =
  39. 39.17² =
  40. 40.21² =

Answer key

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

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