Approximating with sequential numbers

An easy way to express approximate numbers is to use two sequential numbers in a row. The structure is:

Number + (Number+1)

This is similar to saying "x to y", "x or y" or "about x" in English.

Some examples:

• 三 四 个人。
• 我 喝 了 七 八 瓶 啤酒 了。
• 一 两 天。