一个小数去掉小数点后比原数大11.7,原数是1.3. .
: =40 =80%= ÷40.
填上适当的数. 7÷13== ÷ ÷7= 9cm=dm.
=12: =0.75= %
= : =27÷ =.
÷2== 折= %=0.75.