Add 3/4 + (-2 1/2) using the number line

go left of 0 -2.5 spaces then go right .75 spaces = -1.75 or -1 3/4

Step-by-step explanation:

go left of 0 -2.5 spaces then go right .75 spaces = -1.75 or -1 3/4

3 1/4

Step-by-step explanation:

It's easiest to think of 3/4 + (-2 1/2) as (-2 1/2) + 3/4.

-2 1/2 represents the low end and 3/4 the high end.  The sum is found by calculating the distance between them.

The distance from -2 1/2 to 0 is 2 1/2; that from 0 to 3/4 is 3/4.

So all we need to do now is to add up these two positive numbers:

2 2/4 + 3/4 = 2 5/4, or 3 1/4.

i can't solve unless i know what the line is

step-by-step explanation:

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