能简便的用简便方法。(2⼀3一2⼀5)×(3⼀4÷4⼀5)=

2025-03-30 15:59:59
推荐回答(3个)
回答1:

能简便的用简便方法。(2/3一2/5)×(3/4÷4/5)
=(2/3-2/5)*(3/4*5/4)
=(2/3-2/5)*15/16
=2/3*15/16-2/5*15/16
=5/8-3/8
=2/8
=1/4

回答2:

(2/3一2/5)×(3/4÷4/5)
= (2/3一2/5)×3/4×5/4
=2/3×3/4×5/4-2/5×3/4×5/4
=1/2×5/4-2/5×5/4×3/4
=5/8-1/2×3/4
=5/8-3/8
=1/4

回答3:

这题没法简算