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Notes Modeling Integer Operations You can visually represent addition and multiplication using a number line. This is a great way of showing what the operation represents! BIG IDEA: Addition is represented with two arrows stacked on top of each other. represents positive represents negative *Always start with the arrow closest to the number line. It should start at 0. *Count the number of spaces each arrow covers. *The answer to the problem is where the top arrow stops. Example 1 : Write the addition problem represented by the number line below. ANSWER: This represents -6 + 10 = 4. You try! – Write the addition problem represented by the number line below: 1) 2) BIG IDEA: Multiplication is represented by groups of arrows the same size in a row. *Count the number of arrows. Write down this number first. *The size of the arrow is the second number (they should all be the same!) * represents positive represents negative *The answer to the problem is where the arrows stop. Example 2 : represents 7 x (-2) = -14 You try! – Write the multiplication problem represented by the number line below. 3) 4) Mixed – you try! Write the problem represented by the number line below. 5) 6)