According to Baidu question bank, a math book weighs about () A.20B.200; C.2 kilograms. The answer is B, so it's 200 grams.

Mathematics comes from the ancient Greek word μ? θξμα(máthēma) is a discipline that studies related concepts such as quantity, structure, change, space and information. By using abstract and logical reasoning, the shape and motion of objects are counted, calculated, measured and observed.