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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 384 · 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. 2.19² =
  3. 3.14² =
  4. 4.25² =
  5. 5.17² =
  6. 6.18² =
  7. 7.13² =
  8. 8.11² =
  9. 9.26² =
  10. 10.15² =
  11. 11.27² =
  12. 12.23² =
  13. 13.28² =
  14. 14.22² =
  15. 15.21² =
  16. 16.16² =
  17. 17.29² =
  18. 18.17² =
  19. 19.24² =
  20. 20.23² =
  21. 21.19² =
  22. 22.24² =
  23. 23.21² =
  24. 24.26² =
  25. 25.26² =
  26. 26.15² =
  27. 27.29² =
  28. 28.28² =
  29. 29.13² =
  30. 30.21² =
  31. 31.23² =
  32. 32.14² =
  33. 33.15² =
  34. 34.17² =
  35. 35.29² =
  36. 36.25² =
  37. 37.27² =
  38. 38.11² =
  39. 39.21² =
  40. 40.13² =

Answer key

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

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