6 Rules for Subtracting Integers Rewrite the subtraction problem as an addition problem:Change the minus to a plus.Change the sign of the number to be subtracted (the second number). If the second number is positive, make it negative; if the second number is negative, make it positive.Solve using the rules for addition.
7 Example 2 Subtract: 16 – (-13) = Strategy: Rewrite the problem as an addition problem.Step 1: Rewrite the problem.=Step 2: Add.= 29
9 Rules for Multiplying Integers If the signs are alike, the answer is positive.If the signs are different, the answer is negative.
10 Example 3(-25) x (-8) x (-2) =Strategy: Follow the rules for multiplying integers.Step 1: Multiply the numbers.25 x 8 x 2 = 400Step 2: Determine the sign of the answer.(-) x (-) = (+); (+) x (-) = (-)The sign of the answer is negative.-400