segunda tarea salon 1-5

1.1._(3/5)/(16/9)=(27/80)(-2)=(-27/40)+12=507/40(-2)=-1014/40-36=-426/40

1.2._(3/5)/(16/9)=(27/80)(2)=(54/80)+12=1010/80(2)=2020/80-36=-860/80

2.1._-13(-3)=39-35=+2/7-15/8=-89/56+4=313/56

2.2._-13(3)=-39-35=-74+2/7-15/8=-74+-89/56=-4233/56

3.1._21(-4)-16(-4)=- -84-64=20-18=2+23=25-65=-40+79=39--180=219

3.2._21(5)-16(5)=105-80=25-18=7+23=30-65=-35+79=44-45(5)=44-225=-181

4.1._(9/8)(7/14)=(63/112)/(23/6)=(378/2576)(-6/1)=2268/2576+-6/5=26790/12880=2.0799-19=-16.92

4.2._9/8(7/14)=(63/112)/(23/6)=(378/2576)(3/1)=1134/2576+1/5(3/1)=-17.959