Question

有理数的加减法

1. （-7)-(-8)+(-9)-14
2. (-32)-17-(-65)+5
3. (-7.7)+(2.3)-(-12.6)
4. (-2f分之1)-(-3分之1)+(-4分之1)
5. -5+8-28-10
6. 0-3.4+5-4.6
7. -2分之7-4分之9+2分之3
8. 4分之3-1.75-0+3

跪求啊，马上要啊
9.

Answer 1

1. （-7)-(-8)+(-9)-14=-7+8-9-14=-8-14=-22
2. (-32)-17-(-65)+5=-32-17+65+5=-39+70=31
3. (-7.7)+(2.3)-(-12.6)=-7.7+2.3+12.6=14.9-7.7=7.2
4. (-2f分之1)-(-3分之1)+(-4分之1)=1/2+1/3-1/4=1/4+1/3=7/12
5. -5+8-28-10=-15-20=-35
6. 0-3.4+5-4.6=1.6-4.6=-3
7. -2分之7-4分之9+2分之3=-2/7-4/9+6/9=-2/7+2/9=-4/63
8. 4分之3-1.75-0+3=0.75-1.75+3=-1 +3=2