There is a passage called“Adding and Subtracting(减去)Negative numbers”.We will study negative number Operation methodon the basis of the positive number,you will learn that minus a negative(负数)can be thought of as plus a positive.How do you deal with adding and subtracting negatives?The process works similarly(相似的)to There is a passage called “Adding and Subtracting Negative numbers ”. We will study negative number Operation methodon the basis of the positive number, you will learn that minus a negative positive.How do you deal with adding and subtracting negatives? The process works similarly (similar) to