ACT Math : How to subtract integers
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Example Questions
Example Question #1 : Operations
On an airline flight of 250 people there is a choice of pasta, salad, or pizza for dinner. If 113 passengers choose pasta and 30% choose salad, how many passengers choose pizza?
100
62
53
75
62
30% of 250 is 75. Therefore, 250 – 75 – 113 = 62
Example Question #2 : How To Subtract Integers
At a store, a t-shirt costs . If Shane bought t-shirts and shoes from the store for , how much were the shoes?
If one shirt costs , then two shirts must cost . The difference of the total and this number is the cost of the the shoes.
Example Question #1 : How To Subtract Integers
is equivalent to which of the following?
To answer this question, we must remember how to distribute a negative when we are subtracting an entire expression.
To distribute a negative, you change the sign of everything within the expression being subtracted from positive to negative or negative to positive. You then add the resulting expression. So, for this data:
We can then add the like expressions normally (combine with , with , and with ). Therefore, for this data:
Therefore, our answer is .
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