我就是飞儿
幼苗
共回答了14个问题采纳率:85.7% 举报
(1)1/4+37/7*25%+26/7除以4
=1x1/4+37/7x1/4+26/7x1/4
=(1+37/7+26/7)x1/4
=10x1/4
=2.5
(2)(84%除以3+8.72)除以90%
=(0.28+8.72)÷0.9
=9÷0.9
=10
(3)(5/3*4/7+3/7*5/3)除以250%
=5/3x(4/7+3/7)÷5/2
=2/3
(4)4/9*【3/4—(7/16—25%)】
=4/9x(3/4-7/16+1/4)
=4/9x(1-7/16)
=4/9x9/16
=1/4
1年前
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