Question

a;b thôi ạ

Answer 1

`a)-1/12+2/5+1/12`

`=>(-1/12+1/12)+2/5`

`=>0+2/5`

`=>2/5`

`b) 3,54.(−23,4)+3,54.(−76,6)`

`=>3,54.[(−23,4)+(−76,6)]`

`=>3,54.−100`

`=>-354`