(470-290):9•10

To solve this expression, we need to follow the order of operations (also known as PEMDAS).

First, we perform the subtraction: 470 - 290 = 180

Next, we divide the result by 9: 180 ÷ 9 = 20

Finally, we multiply the quotient by 10: 20 * 10 = 200

Therefore, the answer is 200.