(+3å 3/4)-(-1å 1/2)+(-1/6)-(-5/8)+(+4å 2/3)
=3 å3/4+1 å1/2+5/8+ï¼4å 2/3-1/6ï¼
= 3å 3/4+5/8+ï¼4å1/2+1å 1/2ï¼
=4å3/8+6
=10å3/8
2-(5å 5/6)-(4 å3/7)+(-2 å1/6)-(6å 11/21ï¼
=2-ï¼5å5/6+2å1/6ï¼-ï¼4å3/7+6å11/21ï¼
=2-8-10å20/21
=-16å20/21
温馨提示:内容为网友见解,仅供参考