7.2÷16= 0.72÷0.16= 7.2÷0.045=
0.87×1.20.87 3.88÷0.973.9×10
7.6×0.887.6 5.16÷1.25.16
6×0.9=5.4 6.666×666.9=
6.6×6.9=45.54 6.6666×6666.9=
6.66×66.9=445.554 6.66666×66666.9=
0.9×3= 3.6÷0.6= 50×0.2= 5.4÷0.9=
7.5×8= 1.8x+4.8x= 2.8a-1.9a= 2.4÷1.2=
A( ),B( ),C( )。