题目内容
判断对错
7+3=9
( )
3.75×2.1+7.9×3.75
=3.75×(2.1+7.9)
=3.75×10
=37.5
7-2+3=9
19.36-(7+9.36)=19.36-9.36-7=10-7.3
3.75
=
(