初一数学有理数计算题.求解答.过程要写清.
问题描述:
初一数学有理数计算题.求解答.过程要写清.
(-2)-(+2/3)
(-16又3/4)-(-10又1/4)-(+1又1/2)
-4.2+5.7-8.4+10
-1/4+5/6+2/3-1/2
12-(-18)+(-7)-15
4.7-(-8.9)-7.5+(-6)
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+3又1/8)
(-2/3)+|0-5又1/6|+|-4又5/6|+(-9又1/3)
答
(-2)-(+2/3)=-2-2/3=-2又2/3 (-16又3/4)-(-10又1/4)-(+1又1/2)=-16又3/4+10又1/4-1又1/2=-6又1/2-1又1/2=-8-4.2+5.7-8.4+10=1.5-8.4+10=-6.9+10=3.1-1/4+5/6+2/3-1/2=-3/12+10/12+8/12-6/12=7/12+8/12-6/12=15/12-6/...