Current location - Training Enrollment Network - Mathematics courses - Xiaoming spent 13 yuan on snacks, picked up 9 yuan, and now he has 26 yuan. How much money does Xiaoming have?
Xiaoming spent 13 yuan on snacks, picked up 9 yuan, and now he has 26 yuan. How much money does Xiaoming have?
Xiaoming spent 13 yuan on snacks, picked up 9 yuan, and now he has 26 yuan. Xiaoming once had money from 30 yuan.

In ancient China, mathematics was called arithmetic, which originated from early human production activities. Babylonians have accumulated some mathematical knowledge since ancient times, but as far as mathematics itself is concerned, their mathematical knowledge is only obtained through observation and experience, and there is no comprehensive conclusion and proof.