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5/11*34*1/10*2/51= 8/9*[3/4-[7/16-1/4]=
人气:221 ℃ 时间:2020-09-30 11:57:38
解答
5/11×34×1/10×2/51
=(5/11×1/10)×(34×2/51)
=1/22×4/3
=2/33
8/9×[3/4-(7/16-1/4)]
=8/9×(3/4-3/16)
=8/9×9/16
=1/2
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