arithmetic
n.算术; 算术运算; 四则运算 复数：arithmetics 牛津词典 noun 算术the type of mathematics that deals with the adding, multiplying, etc. of numbersHe's not very good at arithmetic.他不太擅长算术。 算术运算；四则运算sums involving the...
n.算术; 算术运算; 四则运算 复数：arithmetics 牛津词典 noun 算术the type of mathematics that deals with the adding, multiplying, etc. of numbersHe's not very good at arithmetic.他不太擅长算术。 算术运算；四则运算sums involving the...