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1. Efectueaza exercitiile :
a. 10 -[(7+3): 5+(4-1):3]=
b. 100-[(33:3x2-20) -( 42x2:4-20)]=
c.[3+(2x2x2:8-1)-(7x4:2-13)] :2 =
d. 6-[(5+37) -(5+12:6)] :7+3:3-4:4=

Răspuns :

Genesisrodriguez
a)...=10-[2+1]=10-3=7
b)...=100-[(22-20)-(21-20)]=100-2-1=97
c)...=[3+(1-1)-(14-13)]:2=[3+0-1]:2=2:2=1
d)...=6-[42-7]:7+9-16=6-35:7+9-16=6-5+9-16=10-16=-6

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