Question

Tính nhanh

(200×153+400)÷(202×155-310)

Answer 1

\(\left(200\cdot153+400\right):\left(202\cdot155-310\right)\)

\(=\left(200\cdot153+2\cdot200\right):\left(202\cdot155-155\cdot2\right)\)

\(=\left[200\cdot\left(153+2\right)\right]:\left[155\cdot\left(202-2\right)\right]\)

\(=\left(200\cdot155\right):\left(155\cdot200\right)\)

\(=1\)

Answer 2

(200×153+400):(202×155-310)

= [200×(155-2)+400]:[(200+2)×155-310]

= (200×155-200×2+400):(200×155+2×155-310)

= (200×155):(200×155)

= 1

Answer 3

 tính máy tính nhanh nhất