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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 386 · 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. 1.14² =
  2. 2.23² =
  3. 3.24² =
  4. 4.21² =
  5. 5.15² =
  6. 6.13² =
  7. 7.26² =
  8. 8.29² =
  9. 9.11² =
  10. 10.16² =
  11. 11.28² =
  12. 12.22² =
  13. 13.19² =
  14. 14.18² =
  15. 15.25² =
  16. 16.17² =
  17. 17.27² =
  18. 18.11² =
  19. 19.25² =
  20. 20.12² =
  21. 21.28² =
  22. 22.13² =
  23. 23.24² =
  24. 24.18² =
  25. 25.17² =
  26. 26.26² =
  27. 27.27² =
  28. 28.27² =
  29. 29.13² =
  30. 30.12² =
  31. 31.22² =
  32. 32.19² =
  33. 33.18² =
  34. 34.27² =
  35. 35.12² =
  36. 36.29² =
  37. 37.29² =
  38. 38.23² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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