120:(70-(21+(7-4)2)
= 120:(70-(21+32)
= 120:(70-(21+9)
= 120:(70-30)
= 120:40
= 30
Học tốt
120 : ( 70 - ( 21 + ( 7-4 )2 ))
= 120 : ( 70 - ( 21 + 9 ) )
= 120 : ( 70 - 30)
= 120 : 40=3
120:(70-(21+(7-4)^2))
=120:(70-(21+3^2))
=120:(70-(21+9))
=120:(70-30)
=120:40
=3
\(120:\left(70-\left(21+\left(7-4\right)^2\right)\right)\)
\(=120:\left(70-\left(21+9\right)\right)\)
\(=120:40\)
\(=3\)
\(120\div\left(70-\left(21+\left(7-4\right)^2\right)\right)\)
\(=120\div\left(70-\left(21+3^2\right)\right)\)
\(=120\div\left(70-30\right)\)
\(=120\div40\)
\(=30\)
