有理数的加减法1.（-4.7）+(-5.3) 2.(-0.25)+(+3/4) 希望加上过程，谢谢~

Question

3.（-1.375）+(-1.125) 4.(-8又1/3）+（-4又1/2) 希望可以有人帮我解答~谢谢

Answer 1

（-4.7）+(-5.3)

  =-(4.7+5.3)

=-10

2.(-0.25)+(+3/4)

=+(0.75-0.25)

=0.5

3.（-1.375）+(-1.125)       

=-(1.375+1.125)

=-2.5

4.(-8又1/3）+（-4又1/2)  

=-(8又1/3+4又1/2)

=-12又6分之5

Answer 2

（-4.7）+(-5.3)=-(4.7+5.3)=-10

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

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

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

Answer 3

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