3、在括号里填上适当的数 2+( )=7 ( )+6=6 ( )+3=10 ( )+( )=9

问题描述:

3、在括号里填上适当的数 2+( )=7 ( )+6=6 ( )+3=10 ( )+( )=9

2+(5 )=7 (0 )+6=6 (7 )+3=10 (4 )+(5 )=9,应该是这样.