\(=1\)

lờ mao

a.\(\frac{327.412+400}{328.412-12}=\frac{327.412+400}{\left(327+1\right).412-12}=\frac{327.412+400}{327.412+412-12}=\frac{327.412+400}{327.412+400}=1\)

b.\(\frac{1234.567-667}{1234.566+567}=\frac{1234.\left(566+1\right)-667}{1234.566+567}=\frac{1234.566+1234-667}{1234.566+567}=\frac{1234.566+567}{1234.566+567}=1\)

A=36 x 350 + 1,2 x 20 x 3 + 9 x 4 x 4,5

= 12600  + 72 + 162

= 12834

A=126+72+163

A=397

B=1/6 x 1,25+0,25

B=1/6x5/4+1/4

B=5/24+1/4

B=11/24

c ko tìm đc

Bọn em đang cần gấp đấy

=1234.(566+1)-677/567+1234.566

=1234.566+1234-667/567+1234.566

=1234.566+567/567+1234.566

=1

\(\frac{1234.567-667}{1234.566+567}=\frac{1234.\left(566+1\right)-667}{1234.566+567}=\frac{1234.566+1234-667}{1234.566+567}\) =\(\frac{1234.566+567}{1234.566+567}=1\)

\(\frac{1234\times567-667}{567}+1234+566\)

\(=\frac{1234\times567-567-100}{567}+1234+566\)

\(=\frac{1234\times567}{567}-\frac{567}{567}-\frac{100}{567}+1234+566\)

\(=1234-1-\frac{100}{567}+1234+566\)

\(=1234\times2+564+\left(1-\frac{100}{567}\right)\)

\(=3032+\frac{467}{567}=3032\frac{467}{567}\)