The expression is .
The sum is unchanged no matter how one groups the numbers.
This illustrates the additive identity property:
Question illustrates Identity Property of Addition.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4dd84a327bef7a1fb6e1dac32285829e.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=407e45279b665d90841e082d419c0af9.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")