能简算的简算 1.2×42-（4.46+0.14） 9.6+1÷3-2/3 0.575×19+1.9×4.25 （7+7/15）÷7/5-1/3

1.2×42-（4.46+0.14）＝1x42+0.2x42-4.6=42+8.4-4.6=50.4-4.6=45.89.6+1÷3-2/3 =9.6+1/3-2/3=9+3/5-1/3=9+9/15-5/15=9又 4/150.575×19+1.9×4.25＝1.9x5.75+1.9x4.25=1.9x(5.75+4.25)=1.9x10=19（7+7/15）÷7/5-1...