September 2018 1 67 Report
Suma y resta
1) -4( 8 :(-11+7)+3(-2+6))= (lo quiero resuelto hasta abajo)
2) -12:(-4(5-3)-2(-23+21))=
3) 5(-16:(21-13)-3(-7+15))=
4) (-10:(17-12)+2(-8+5))-5=
5) -28:((-12+9)-(9-12:3)+1=
6) -45:(-2+12:(-7+3))+12=
7) -(-24:(-15+7))+5
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