64÷25=
[ ]
37.8÷12=
82.5÷15=
34.2÷6=
1.32×50×0.02=
0.65×10.2=
0.8×5.6×12.5=
12.5×4.8=
3.05×0.24=
用简便方法算
3.2×19+3.2=
A.5.4
B.6.4
C.46
D.64