(+)-(+) and (-)-(-)
Find the absolute value of the two numbers. If the first number is larger, the answer is positive. If the 1st number is smaller, answer is negative.
(+)- (-) and (-) - (+)
Add the absolute values, if the first number is negative the answer is negative. If the first number is positive the answer is positive.
Write 4 problems that prove each subtraction rule.
No comments:
Post a Comment