3.5*(20.6-16.8÷4.8)脫式計算能簡算的要簡算

3.5*(20.6-16.8÷4.8)脫式計算能簡算的要簡算


3.5*(20.6-16.8÷4.8)
=3.5×(20.6-3.5)
=3.5×17.1
=59.85



7/20+(8又1/4-6又3/5)÷2又3/4簡算快!


7/20+(8又1/4-6又3/5)÷2又3/4
=7/20+(33/4-33/5)÷11/4
=7/20+33/4÷11/4-33/5÷11/4
=0.35+3-2.4
=3.35-2.4
=0.95