Fill in the blanks:
1+(-2)+3+(-4)_(-1)+(2)+(-3)+4
1+(-2)+3+(-4)=1-2+3-4=-2(-1)+(2)+(-3)+4=-1+2-3+4=2-2<2∴1+(-2)+3+(-4)<(-1)+(2)+(-3)+4
23+34-___=12
Fill in the blanks : (-1)3+(-1)4=____.
12, 23, 34, 54
Smallest fraction = ____
Biggest fraction = ____