Trl :
45 x 35 + 45 x 65
= 45 x ( 35 + 65 )
= 45 x 100
= 4500
Trả lời :
\(45\times35+45\times65\)
\(=45\times\left(35+65\right)\)
\(=45\times100\)
\(=4500\)
Hok tốt
105 300 nha bn
20,10x35-19,45x65+20,10x65-19,45x35
=(35+65)x20,10+(35+65)x19,45
=100x20,10-100x19,45
=100x(20,10-19,45)
=100x0,65=65
45x35+45x65
=45x(35+65)
=45x100
=4500
HT
45 x 35 + 45 x 65
1575 + 2925 = 4500 nhé TK cho
