RESPUESTAS:
1.-3+4=7+5=12-6=6-7=-1-4=-5+7=2-4=-2+9=7
2.--6+4=-2-6=-8-6=-14+2=-12-9=-21-8=-29+2=-27+3=-24+6=-18-8=-29-12=-41-43=-84+67=-17
3.-(2)(12)=-10(3)=-30(3)=-90(-2)=180(1)=180(3)=540
4.-(-2)(3)=-6(1)=-6(-4)=24(5)=120(6)=720(-7)=-5040(-8)=40320
5.-(2)(-3)=-6(4)=-24(5)=-120 -4+5=1-6=-7+7=0-8=-8+9=1-12=-11+24=13-33=-30-120=-150
6.-(27)+(20)/(36)=(47)/(36)
7.-(24)-(28)/(8)=(-4)/(8)
8.-(36)/(15)-(24)/(77)=(2772)-(360)/(1155)=(804)/(385)
9.-(24)/(6)(4/4)=(96)/(24)+(2)/(5)=(480)+(48)/(120)=(528)/(120)=(264)/(60)=(132)/(30)=(66)/(15)=(229/(5)+(3)/(4)=(88)+(15)/(20)=(103)/(20)-(16)/(7)=(721)-(320)/(140)=(401)/(140)
10.-(36)/(45)+(25)/(3)=(108)+(1125)/(135)=(1233)/(1305)=(411)/(45)=(137)/(15)-(6)/(4)=(548)-(90)/(60)=(458)/(60)-(7)/(5)=(2290)-(420)/(300)=(1870)/(300)
11.-(154)/(69)(+36)/(30)=(4620)+(2484)/(2070)=(7104)/(2070)=(3552)/(1035)=(1184)/(345)
12.-(10/400)/(150/91)=(910/60000)=(455/30000)=(91/600)/(12/7)=(637/7200)+(3/2)=(1274+21600/14400)=(22874/144000)=(11437/7200)
kevin joseph cruz padilla 1-4turno:matutino