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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 380 · 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. 2.24² =
  3. 3.25² =
  4. 4.16² =
  5. 5.21² =
  6. 6.22² =
  7. 7.18² =
  8. 8.23² =
  9. 9.14² =
  10. 10.15² =
  11. 11.13² =
  12. 12.29² =
  13. 13.11² =
  14. 14.27² =
  15. 15.17² =
  16. 16.28² =
  17. 17.28² =
  18. 18.11² =
  19. 19.26² =
  20. 20.23² =
  21. 21.19² =
  22. 22.24² =
  23. 23.19² =
  24. 24.26² =
  25. 25.14² =
  26. 26.24² =
  27. 27.21² =
  28. 28.14² =
  29. 29.18² =
  30. 30.21² =
  31. 31.14² =
  32. 32.16² =
  33. 33.29² =
  34. 34.18² =
  35. 35.16² =
  36. 36.29² =
  37. 37.19² =
  38. 38.21² =
  39. 39.28² =
  40. 40.11² =

Answer key

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

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