Addition and Subtraction

Question 1

how do you add and subtract negative numbers

Answer 1

If you have two signs next to each other, change them to a single sign. If the signs are the same replace with a positive sign (+). If the signs are different, replace with a negative sign (−).

Question 2

how do you add decimals

Answer 2

line up the decimal points vertically, fill in any gaps with zeros if needed, and then add the numbers as if they were whole numbers, remembering to carry over when necessary, and finally, place the decimal point in the answer directly below the others