有理数减法与有理数加减法混合运算(要有过程,后面的混合运算不是加减号,是正负号。) 10
-2-5=-7 2. -9.8-6=-15.8
3. 4.8+2.7=7.5 4. 0.5-1/3=1/6
5. -6+6=0 6. -6-18=-24
7. = |-1又1/4+2又1/3|+1又1/2 8. -3又2/3+1又2/3+1.75+2又3/4
=1又1/12+1又1/2 =2+4又1/2
=2又7/12 =6又1/2
9. =17+32-23 10. = 6-12+8.3-7.4
=26 =-5.1
11 .-0.4 12. -5
13. =73-8+9-2+5 14. 4
=77
15. -5