。
①21.04÷0.8-12.6
②3.2×1.25×25
③6.78×99+6.78
④83.5÷1.25÷8
⑤2.6×199
⑥32.13÷[(1.2+0.5)×9]
0.42÷7= 2÷5= 1÷0.2= 8.4÷2.1= 1.26÷0.6=
0.5÷0.2= 4÷0.4= 0.69÷1= 0.9×100÷1000= 12.5÷0.5÷0.4=
B .
C .
D .
B .
C .
D .


