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计算(1)-2.5+(-1/5);(2)0.4-(-1/4)+1/6(2)1/3-(-5/6)+2/3;(4)1/3+(-1/5)+1+2/3;(5)27-18+(-7)-32;(6)0.5+(-1/
题目内容:
计算
(1)-2.5+(-1/5); (2)0.4-(-1/4)+1/6
(2)1/3-(-5/6)+2/3; (4)1/3+(-1/5)+1+2/3;
(5)27-18+(-7)-32; (6)0.5+(-1/4)-(-2.75)+1/2优质解答
(1) -2.7
(2) =2/5+1/4+1/6=49/60
(3)=1+5/6=11/6
(4)=2-1/5=9/5
(5)=20-50=-30
(6)=1-0.25+2.75=3.5
(1)-2.5+(-1/5); (2)0.4-(-1/4)+1/6
(2)1/3-(-5/6)+2/3; (4)1/3+(-1/5)+1+2/3;
(5)27-18+(-7)-32; (6)0.5+(-1/4)-(-2.75)+1/2
优质解答
(2) =2/5+1/4+1/6=49/60
(3)=1+5/6=11/6
(4)=2-1/5=9/5
(5)=20-50=-30
(6)=1-0.25+2.75=3.5
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