6.66+3.63÷0.6+19.34=6.66+19.34+3.63/0.6=26+6.05=32.054.8+3.6x0.5-0.4简便计算=4.8-0.4+3.6x0.5=4.4+1.8=4.4+2-0.2=6.2
