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(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-1

来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/20 06:55:15
(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-18+(-7)-32
(5)0.5+(-4/1)-(2.75)+2/1(6)33.1-(-22.9)+(-10.5)(7)(-8)-(-15)+(-9)-(-12)(8)-3/2+(-6/1)-(-4/1)-2/1(9)5/3-2/3+(-4/11)+4/13
(1)0.4-(-4/1)+6/1(2)3/1-(-6/5)+3/2(3)3/1+(-5/1)+1+3/2(4)27-1
(1)0.4-(-4/1)+6/1
=0.4+1/4+1/6
=24/60+15/60+10/60
=49/60 (六十分之四十九)
(2)3/1-(-6/5)+3/2
=1/3+5/6+2/3
=2/6+5/6+4/6
=11/6(六分之十一)
(3)3/1+(-5/1)+1+3/2
=1/3-1/5+1+2/3
=5/15-3/15+15/15+10/15
=27/15(十五分之二十七)
(4)27-18+(-7)-32
=27-18-7-32
=-30
(5)0.5+(-4/1)-(2.75)+2/1
=0.5-0.25-2.75+0.5
=-2
(6)33.1-(-22.9)+(-10.5)
=33.1+22.9-10.5
=45.5
(7)(-8)-(-15)+(-9)-(-12)
=-8+15-9+12
=10
(8)-3/2+(-6/1)-(-4/1)-2/1
=-2/3-1/6+1/4-1/2
=-8/12-2/12+3/12-6/12
=-13/12(负十二分之十三)
(9)5/3-2/3+(-4/11)+4/13
=3/5-3/2-11/4+13/4
=12/20-30/20-55/20+65/20
=-8/20
=-2/5(负五分之二)