-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7

问题描述:

-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)
(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7

-2-3-(-5)=-2-2+5=0

(+3)-(-1.6)+(-2.7)-(-7)+(2.9)=3+1.6-2.7+7+2.9=11.8

(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
=-26/5+3/2-1/12-19/5+87/7
=(2184+630-35+5220)/(5x12x7)
=8069/420

0 11

初一数学题求解!-2-3-(-5) =-2-3-5=-10;(+3)-(-1.6)+(-2.7)-(-7)+(2.9)=3+1.6-2.7+7+2.9=3+2.3+0.2=3+2.5=5.5;(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7=-26/5+3/2-1/12-19/5+87/7=-45/5+18/12-1/12+87/7=-1...

-2-3-(-5)
=-5+5
=0

(+3)-(-1.6)+(-2.7)-(-7)+(2.9)
=3+1.6-2.7+7+2.9
=10-2.7+4.5
=11.8

(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
=-26/5+3/2-1/12-19/5+87/7
=-45/5+18/12-1/12+87/7
=-9+17/12+87/7
=-756/84+119/84+1044/84
=407/84