有理数的简便算法题~(1又3/4)+2又7/8+(-1/4)=(-0.5)+3又1/4+2,75+(-7又1/2)=1又4/7+(-2又1/3)+3/7+1/3=(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=“-”这个是负号第一道和最后一道题直接写
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![有理数的简便算法题~(1又3/4)+2又7/8+(-1/4)=(-0.5)+3又1/4+2,75+(-7又1/2)=1又4/7+(-2又1/3)+3/7+1/3=(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=“-”这个是负号第一道和最后一道题直接写](/uploads/image/z/12562502-14-2.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E9%A2%98%7E%EF%BC%881%E5%8F%883%2F4%EF%BC%89%2B2%E5%8F%887%2F8%2B%EF%BC%88-1%2F4%EF%BC%89%3D%EF%BC%88-0.5%EF%BC%89%2B3%E5%8F%881%2F4%2B2%2C75%2B%EF%BC%88-7%E5%8F%881%2F2%EF%BC%89%3D1%E5%8F%884%2F7%2B%EF%BC%88-2%E5%8F%881%2F3%EF%BC%89%2B3%2F7%2B1%2F3%3D%EF%BC%88-3%E5%8F%881%2F4%EF%BC%89%2B%EF%BC%88%2B3%E5%8F%882%2F3%EF%BC%89%2B%EF%BC%88%2B2%E5%8F%881%2F4%EF%BC%89%2B%EF%BC%88-1%E5%8F%882%2F3%EF%BC%89%3D%E2%80%9C-%E2%80%9D%E8%BF%99%E4%B8%AA%E6%98%AF%E8%B4%9F%E5%8F%B7%E7%AC%AC%E4%B8%80%E9%81%93%E5%92%8C%E6%9C%80%E5%90%8E%E4%B8%80%E9%81%93%E9%A2%98%E7%9B%B4%E6%8E%A5%E5%86%99)
有理数的简便算法题~(1又3/4)+2又7/8+(-1/4)=(-0.5)+3又1/4+2,75+(-7又1/2)=1又4/7+(-2又1/3)+3/7+1/3=(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=“-”这个是负号第一道和最后一道题直接写
有理数的简便算法题~
(1又3/4)+2又7/8+(-1/4)=
(-0.5)+3又1/4+2,75+(-7又1/2)=
1又4/7+(-2又1/3)+3/7+1/3=
(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=
“-”这个是负号
第一道和最后一道题直接写答案~
有理数的简便算法题~(1又3/4)+2又7/8+(-1/4)=(-0.5)+3又1/4+2,75+(-7又1/2)=1又4/7+(-2又1/3)+3/7+1/3=(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=“-”这个是负号第一道和最后一道题直接写
(1又3/4)+2又7/8+(-1/4)
=1+3/4+2+7/8-1/4
=3+1/2+7/8
=4+3/8
=4又8分之3;
(-0.5)+3又1/4+2,75+(-7又1/2)=
=-1/2+3+1/4+2+3/4-7-1/2
=6-7-1
=-2;
1又4/7+(-2又1/3)+3/7+1/3=
=1+4/7-2-1/3+3/7+1/3
=2-2
=0;
(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)=
=-3-1/4+3+2/3+2+1/4-1-2/3
=-3+3+2-1-1/4+1/4+2/3-2/3
=1;
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