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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 357 · 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. 2.21² =
  3. 3.13² =
  4. 4.29² =
  5. 5.23² =
  6. 6.26² =
  7. 7.11² =
  8. 8.15² =
  9. 9.25² =
  10. 10.24² =
  11. 11.19² =
  12. 12.16² =
  13. 13.28² =
  14. 14.14² =
  15. 15.21² =
  16. 16.17² =
  17. 17.22² =
  18. 18.18² =
  19. 19.27² =
  20. 20.13² =
  21. 21.17² =
  22. 22.12² =
  23. 23.24² =
  24. 24.16² =
  25. 25.24² =
  26. 26.18² =
  27. 27.19² =
  28. 28.23² =
  29. 29.13² =
  30. 30.24² =
  31. 31.14² =
  32. 32.13² =
  33. 33.16² =
  34. 34.16² =
  35. 35.19² =
  36. 36.11² =
  37. 37.13² =
  38. 38.15² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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