口算： 1.2÷3 = 0.48÷6 = 6.8÷4= 0.72÷12 = 0.4×0.5= 4.6÷23 = 0.7×1.1 = 0.72÷4=
0.4
1.7
0.08
0.06
0.2
0.77
0.18
