Answer:
Ok, we have the equation:
-7 + (-3)
Both numbers are negative, so the solution of this will be:
-7 + (-3) = -7 - 3 = -10.
Now, how we can represent it with tiles?
First we need to define, which tiles are the ones representing negative numbers?
We can use:
Red = positive
Blue = negative.
Then:
-7 is represented with seven blue tiles
-3 is represented with tree blue tiles
then:
(-7) + (-3)
will be represented with seven blue tiles, plus tree blue tiles.
When we add them, we have a total of 10 blue tiles, and as blue tiles represent negative numbers, 10 blue tiles is equal to -10.
