Đề bài
a) \({{ - 3} \over 7}.{{16} \over {12}}\)
b) \(0,35.{5 \over 7}\)
c) \(\left( 3 \right).\left( {{5 \over {12}}} \right)\)
d) \(\left( { - {4 \over {18}}} \right):12\)
Lời giải chi tiết
\(\eqalign{ & a){{ - 3} \over 7}.{{16} \over {12}} = {{ - 3.16} \over {7.12}} = {{ - 4} \over 7} \cr & b)0,35.{5 \over 7} = {{35} \over {100}}.{5 \over 7} = {1 \over 4} \cr & c)( - 3).{5 \over {12}} = {{ - 3.5} \over {12}} = {{ - 5} \over 4} = - 1{1 \over 4} \cr & d)\left( { - {4 \over {18}}} \right):12 = {{ - 4} \over {18}}.{1 \over {12}} = {{ - 1} \over {54}} \cr} \)
soanvan.me