5.8/0.8=( )/8 5.8/0.08=( )/8 5.8/0.008=( )/( )

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5.8/0.8=( )/8 5.8/0.08=( )/8 5.8/0.008=( )/( )

5.8/0.8=( )/8 5.8/0.08=( )/8 5.8/0.008=( )/( )
5.8/0.8=( )/8 5.8/0.08=( )/8 5.8/0.008=( )/( )

5.8/0.8=( )/8 5.8/0.08=( )/8 5.8/0.008=( )/( )
12.8-(0.8+5.8)=6.2 答差是6.2 差=12.8-0.8-5.8=6.2 19.4 12.8+0.8+5.8=19.4

扩倍和缩倍!
分数的性质:分子、分母同乘以或除以同一个数,分数结果不发生变化。