有理数的加减法1.(-4.7)+(-5.3) 2.(-0.25)+(+3/4) 希望加上过程,3.(-1.375)+(-1.125) 4.(-8又1/3)+(-4又1/2) 希望可以有人帮我解答~

问题描述:

有理数的加减法1.(-4.7)+(-5.3) 2.(-0.25)+(+3/4) 希望加上过程,
3.(-1.375)+(-1.125) 4.(-8又1/3)+(-4又1/2) 希望可以有人帮我解答~

  1. (-4.7)+(-5.3)=-(4.7+5.3)=-10

  2. (-0.25)+(+3/4) =-0.25+0.75=0.5

  3. (-1.375)+(-1.125) =-(1.375+1.125)=-2.5

  4. (-8又1/3)+(-4又1/2) =-(8+1/3+4+1/2)=-12又5/6

1.原式=-(4.7+5.3)=-10
2.原式=0.75-0.25=0.5
3.原式=-1.375-1.125=-2.5
4.原式=-77/6

(-4.7)+(-5.3)  =-(4.7+5.3)=-102.(-0.25)+(+3/4)=+(0.75-0.25)=0.53.(-1.375)+(-1.125)       =-(1.375+1.125)=-2.54.(-8又1/3)+(-4又1/2)   =-(8又1/3+4又1/2)=-12又6分之5...