(9,3-7,0002+1,064)-(7,7-6,814-0,16)
1) 9,3-7,0002=2,2998 2) 2,2998+1,064=3,3638 3) 7,7-6,814=0,886 4)0,886-0,16=0,726 5)3,3638-0,726=2,6378