All 3,000 seats in a theater are being replaced. So far, 5 sections of 136 seats and a sixth section containing 348 seats have been replaced. How many more seats do they still need to replace?

They need to replace 1972 chairs. First you have to multiply 5 x 136. That would equal 680. Then it says a sixth section contains 348. So you would add 680 + 348. That would equal 1028. Then subtract, 3000 - 1028 = 19272.

Hope this helps.