Question

tính = cách thuận tiện nhất:

(900*28)/9

Answer 1

\(900\times28:9\\ =\left(900:9\right)\times28\\ =100\times28\\ =2800\)

Answer 2

(900x28):9

=(900:9)x28

=100x28

=2800

Answer 3

\(900\times28:9\)
\(\Rightarrow\left(900:9\right)\times28\)
\(\Rightarrow100\times28\)
\(\Rightarrow2800\)