a ) = (23 + 4) : 12
= 27 : 12
= 9 /4
b) = (235- 112):15
= 41/5
a) 23 : 12 + 4 : 12
= ( 23 + 4 ) : 12
= 27 : 12
= 2,25
b) 235 ; 15 - 112 : 15
= ( 235 -112) : 15
= 123 : 15
= 8,2
a)23:12 + 2:12
= (23+4):12
= 27:12
=2,25
b) 235:15-112:15
= (235-112):15
=123:15
=8,2
a,(23+4):12=27:12=2,25
b,(235-112):15=123:15=8,2
nhớ k mình nha
\(23:12+4:12\)
\(=\left(23+4\right):12\)
\(=27:12\)
\(=\frac{9}{4}\)
\(235:15-112:15\)
\(=\left(235-112\right):15\)
\(=123:15\)
\(=\frac{41}{5}\)
