- 3+4=+7+5=+12-6=+6-7=-1-4=-5+7=+2-4=-2+9= +7
- -6+4=-2-6=-8+2=-6-9=-15-8=-23+2=-21+3=-18-6=-12-8=-20-12=-3-43=75-67= -8
- (-2)(-12)=-24(3)=-72(3)=-126(-2)=218(1)=218(3)= +654
- (-2)(3)=-6(1)=-6(4)=+24(5)=+120(6)=720(-7)=5040(-8) = +40320
- 4+5=+1-6=-5+7=2-8=-6+9=+3-12=9+24=+15-33=-18(2)=-36(-3)=+108(4)=432(5)= 2160
- (3/4)+(5/9)=27+20/36=47/36
- (6/2)-14/4)=24-28/8=4/8=-2/4=-1/2
- (3/5)(12/3)-(4/7)(6/11)=(3/5)(12/3=36/15(4/7)(6/11)=24/44=6/1136/15-6/11=396-90/165=306/165
9.
10. (14/3)/(23/11)+45/24=(154/69+45/24)=3696+3150/1656=6846/1656=2283/552=761/184
11.(((3/25)(16/2)/(25/7)(13/6))/(12/7+3/2)=((48/50)/325/42)/(12/7+3/2))=2016/16250/(45/14)=28224/731250=9408/243750=3136/812500=1568/406250=784/203125
maestro ya le mande la coreccion de las fracciones espero q ya esten bien
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