怎么算啊| -2/3|除以|14/3| (-4又1/3)+2又1/2
1个回答

-3又1/4+(6又2/3)+(+2又2/3)+3又1/4

=-3又1/4+3又1/4+(6+2/3)+(2+2/3)

=8+4/3

=9又1/3

(-3又1/4)+(+3又2/3)+(+2又1/4)+(-1又2/3)

=-3又1/4+2又1/4+3又2/3 -1又2/3

=-1+2

=1

(-3)-(-2又2/5)

=-3+2又2/5

=-3/5

(-1)-[-2-(-4)-|-1/2|-(-1/3)]

=1-[-2+4-1/2+1/3]

=1-[2-1/6]

=1-2+1/6

=-1+1/6

=-5/6

用简便方法:

0.125+(+3又1/4)+(-3又1/8)+(+7/8)+(-0.25)

=1/8+3又1/4-3又1/8+7/8-1/4

=1/8-3又1/8+7/8+3又1/4-1/4

=-3+7/8+3

=7/8

(+3/17)+(3.36)+[(+7.36)+(+14/17)]

=3/17+3.36+[7.36+14/17]

=3/17+3.36+7.36+14/17

=1+10.72

=11.72

(-3/4)+(+3又3/8)+(+0.75)+(-4又1/2)+(+1又5/8)

=-3/4+3又3/8+3/4-4又1/2+1又5/8

=-3/4+3/4-4又1/2+3又3/8+1又5/8

=-4又1/2+5

=1/2

(+1)+(-2)+(+3)+(-4)+••••••+(+99)+(-100)

=(1-2)+(3-4)+••••••+(99-100)

=(-1)*50

=-50