题目内容
判断对错
25×17×4×2
=(25×4)+(17×2)
=100+34
=134
( )
7800÷25×4=7800÷100.
( )
800÷(500-400÷4)
=800÷(100÷4)
=800÷25
=32
判断对错.
25
(