Question

В фотоальбоме певчие птицы 21 открытка. 4 чёрно-белые, остальные цветные. Сколько цветных открыток в 1000 таких альбомах?

Answer 1

1) 21-4= 17 открыток
2)1000×17=1700

Answer 2

1)21-4=17(от)цветные
2)17*1000=17000(от)

Answer 3

Calculating the Number of Colorful Cards in 1000 Albums

To calculate the number of colorful cards in 1000 albums, we can use the information provided in the question.

Given that in a photo album of singing birds, there are 21 cards, with 4 being black and white and the rest being colorful, we can calculate the number of colorful cards in 1000 albums.

Calculation

- In each album, the number of colorful cards = 21 - 4 = 17 - Total number of colorful cards in 1000 albums = 17 * 1000 = 17,000

Therefore, in 1000 such albums, there would be 17,000 colorful cards.

This calculation is based on the information provided and does not require additional external sources for verification.