Explicație pas cu pas:
a) 27-6×4=27-24
=3
b) 90-45÷5-13+17=90-9-13+17
=81-13+17
=68+17
=85
c) 20+(5×6-42÷6)=20+(30-7)
=20+23
=43
d) 12÷[4+(27-57÷3)÷4]=12÷[4+(27-19)÷4]
=12÷(4+8÷4)
=12÷(4+2)
=12÷6
=2
e) 2×[320÷4-(5+240÷8)÷7]=2×[80-(5+30)÷7]
=2×(80-35÷7)
=2×(80-5)
=2×75
=150
SUCCES, SPER SĂ FIE BINE!!!!!
