This becomes important when numbers get too large to fit on the number line. Here are some tricks: Adding a negative number plus a positive number: Switch around the two numbers (and their signs), turning the problem into subtraction. Adding a positive nu
Find the sum of negative 15 plus negative 46 plus negative 29. To do this, let's just first visualize what each of these numbers look like. So I'm going to draw a number line for each of them. Negative 15 might look something like this.
The last two examples showed us that taking away balloons (subtracting a positive) or adding weights (adding a negative) both make the basket go down. So these have the same result: (+6) − (+3) = (+3) (+6) + (−3) = (+3) In other words subtracting a po
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