zhoujunwu
幼苗
共回答了22个问题采纳率:100% 举报
1.原式=2.75+ 2.47+ 1.5+ 1.67 -1.07
=7.32
2.原式=4.4+(-13)+(-24)+ [(-1/3)+(-3 2/3)]
=4.4-13-24+(-4)= -36.6
3.原式=2.75+0.5+(4 2/6 -5/6)+3/8=3.25+3 3/6+0.375=3.25+ 3.5+ 0.375
=7.125
4.原式=-0.5+ 3.25+ 2.6- 5.5+ 1.15 = -(0.5+5.5)+ 3.25+ 1.15+ 2.6
= 1
1年前
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