74 . 45 +55 .36 +45.26 +64.55
= ( 74 + 26) . 45 + (36 +64 ) . 55
= 100 .45 + 100 . 55
= 100 . ( 45+55)
= 100 .100
=10000
=45.(74+26)+55.(36+64) =45.100+55.100 =100.(45+55)=100.100=10000
74.45+55.36+45.26+64.55= 10000
tk cho mk nhé!!!!!!!!!!!!!!!!!!!!