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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 712 · 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. 1.23² =
  2. 2.22² =
  3. 3.27² =
  4. 4.19² =
  5. 5.17² =
  6. 6.21² =
  7. 7.24² =
  8. 8.29² =
  9. 9.12² =
  10. 10.14² =
  11. 11.11² =
  12. 12.18² =
  13. 13.28² =
  14. 14.13² =
  15. 15.16² =
  16. 16.25² =
  17. 17.14² =
  18. 18.26² =
  19. 19.15² =
  20. 20.27² =
  21. 21.17² =
  22. 22.21² =
  23. 23.23² =
  24. 24.21² =
  25. 25.27² =
  26. 26.13² =
  27. 27.24² =
  28. 28.21² =
  29. 29.25² =
  30. 30.14² =
  31. 31.21² =
  32. 32.13² =
  33. 33.17² =
  34. 34.16² =
  35. 35.21² =
  36. 36.28² =
  37. 37.12² =
  38. 38.16² =
  39. 39.24² =
  40. 40.11² =

Answer key

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

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