Question

Efectuati :
a)[434:14-(5608:8+924:33):27]:2-1=
b)71+5•[100-2•(306:9+6)]+54:6•21=
c)46:23+{78-3•[(15+7•5):5]-3•7}=

Answer 1

a)[434:14-(5608:8+924:33):27]:2-1=
=[31-(701+28):27]:2-1=
=(31-729:27):2-1=
=(31-27):2-1=
=4:2-1=
=2-1=1

b)71+5•[100-2•(306:9+6)]+54:6•21=
=71+5•(100-2•34)+9•21=
=71+5•(100-68)+9•21=
=71+5•32+9•21=
=71+160+189=420

c)46:23+{78-3•[(15+7•5):5]-3•7}=
=2+{78-3•[(15+35):5]-21}=
=2+[78-3•(50:5)-21]=
=2+(78-3•10-21)=
=2+(78-30-21)=
=2+27=29