Operations with Integers

Welcome to Integer Math! Multiplying Dividing Integers When multiplying dividing integers, you must follow the rules:+ · + = + and + ÷ + = + ex. 6 · 2 = 12- · - = + and - ÷ - = + ex. -6 · -2 = 12+ · - = - and + ÷ - = - ex. 6 ÷ -2 = -3- · + = - and - ÷ + = - ex. -6 ÷ 2 = -3 Another way to see it is: Multiplication Division Sign Triangle Use the Sign Triangle to determine the sign of your answer. Here's how it's used: Let's Practice! -12 45 -28 48 -72 -105 -52 -96 Match the correct answer with the question -27 ÷ 3 = -9 36 ÷ -9 = -4 -15 ÷ -3 = 5 -35 ÷ -5 = 7 -28 ÷ 4 = -7 56 ÷ -7 = -8 -14 ÷ -14 = 1 -32 ÷ -16 = 2 9 ÷ -3 = -3 MathPlayground.com Try to beat my best time! Play Inter Warp! Adding Subtracting Integers Watch this video to learn a handy trick for adding and subtracting integers... Here's another way to look at it... No More Subtraction? When combining integers (adding or subtracting two separate terms into one term), I like to think that i'm adding everything up. So what used to be subtraction, i like to think of it as adding a negative number.If i'm adding 2 negative numbers together, i think of it just like adding 2 positive numbers together. except my numbers are negative, so i'm collecting a bunch of negative things and my answer would be negative.If i'm subtracting, i like to think of it as the same as adding a negative. For example:8 - 5 is the same as 8 + -5. Both equal 3.or9 - 13 is the same as 9 + -13. Both equal -4. Let's Practice! Which expression would yield a positive answer and which expression would yield a negative answer? POSITIVE + 14 + -4 -1 + 18 -8 + 10 15 - (-15) -6 - (-11) NEGATIVE - -9 + 6 17 -18 -12 - (-10) -17 -4 8 - 15 Write the correct answer next to the question. Practice with Math Games Practice By Playing! Integer Operations Reflection Click the link to complete the lesson reflection. Reflection