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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 143 · 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. 1.16² =
  2. 2.29² =
  3. 3.12² =
  4. 4.13² =
  5. 5.14² =
  6. 6.26² =
  7. 7.25² =
  8. 8.15² =
  9. 9.21² =
  10. 10.22² =
  11. 11.27² =
  12. 12.19² =
  13. 13.11² =
  14. 14.24² =
  15. 15.18² =
  16. 16.23² =
  17. 17.23² =
  18. 18.17² =
  19. 19.11² =
  20. 20.28² =
  21. 21.29² =
  22. 22.26² =
  23. 23.28² =
  24. 24.16² =
  25. 25.13² =
  26. 26.22² =
  27. 27.28² =
  28. 28.25² =
  29. 29.14² =
  30. 30.16² =
  31. 31.26² =
  32. 32.11² =
  33. 33.19² =
  34. 34.24² =
  35. 35.22² =
  36. 36.25² =
  37. 37.26² =
  38. 38.25² =
  39. 39.22² =
  40. 40.29² =

Answer key

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

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