aqeysbg
幼苗
共回答了12个问题采纳率:83.3% 举报
1.原式=(5/6 - 375/1000)×3/2
=(5/6-3/8)×3/2
=11/24×3/2=11/16
2.原式=589/8 - 267/13-162/13
=7657/104 - 2136/104 - 1296/104
=4225/104=40.625
3.原式=85/13 -18/5-12/5
=425/65-234/65-156/65
=35/65=7/13
4.原式=3/2×18/5+ 61/10×3/2+3/10×3/2
=27/5+183/20+9/20
=108/20+183/20+9/20
=300/20=15
1年前
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