Guía N°1

1) 6x(8+10-12+15-20)=

2) 5x(7+12-11+9-8+6)=

3) 7x(9-13+14-10+12)=

4) 10x(8-9+12-5+14-4)=

5) (-6)×(12-15-8+6-14)=

6) (-8)×(10-9-11+8-15)=

7) (15-45+60-80+75)÷5=

8) (24-64+48-34+54)÷2=

9) (36-48+66-9+30)÷(-3)=

10) (49-42+7-14+63)÷(-7)