(1)-5+8-28-10
=-5-20-10
=-35.
(2)0-3.4+5-4.6
=5-8
=-3
(3)-2/7-9/4+3/2
=(-14-9+6)/4
=-17/4
=-4又1/4
(4)3/4-1.75-0+3
=-1+3
=2.
七年级:有理数的运算。
=-5-20-10
=-35.
(2)0-3.4+5-4.6
=5-8
=-3
(3)-2/7-9/4+3/2
=(-14-9+6)/4
=-17/4
=-4又1/4
(4)3/4-1.75-0+3
=-1+3
=2.
七年级:有理数的运算。