Câu 2:
a. \(x+45,8=84,32\)
\(x\) \(=84,32-45,8\)
\(x\) \(=38,52\)
\(90,79+x=173\)
\(x=173-90,79\)
\(x=82,21\)
b. \(65,22+x=73,5\)
\(x=73,5-65,22\)
\(x=8,28\)
\(x+66,45=88,2\)
\(x\) \(=88,2-66,45\)
\(x\) \(=21,85\)
c. \(x-54,4=96,02\)
\(x\) \(=96,02-54,4\)
\(x\) \(=41,62\)
\(20,9-x=3,9\)
\(x=20,9-3,9\)
\(x=17\)
Câu 1:
a. \(54,32-26,2=28,12\)
b. \(14,2+54,08=68,28\)
c. \(90-23,98=67,02\)
d. \(49,43-22=27,43\)