被除数可以满足分配率(3.2+0.56)/0.8=3.2/0.8+0.56/0.8=4+0.7=4.7
3.2/0.8+0.56/0.8=4+0.7=4.7
=3.2÷0.8+0.56÷0.8=4+0.7=4.7
