Question

What is 12 8/15-7+7/15+15? Simplify your answer
A. 20 15/15
B. 41 15/15
C. 35
D. 21

Answer 1

What should you do if a place value is missing a number?
A. Remove the last digit(s) in the number that has the additional place values
B. Add a zero.
C. Subtract without it.
D. Nothing.

Answer 2

To simplify the expression, we can first convert the mixed number 12 8/15 into an improper fraction.

12 8/15 can be written as (12 * 15 + 8)/15, which equals 188/15.

Now we can substitute the values back into the expression:

188/15 - 7 + 7/15 + 15

To add or subtract fractions, we need to have a common denominator. In this case, the denominator is already the same, so we can combine the numerators:

(188 - 105 + 7 + 225)/15

Now we can simplify the numerator:

(188 - 105 + 7 + 225)/15 = 315/15

Dividing the numerator and denominator by their greatest common factor, which is 15, we get:

21/1

So the answer is 21.

Therefore, the correct option is D. 21.

Answer 3

B. Add a zero.

If a place value is missing a number, we can add a zero in that place value to indicate that it holds a value of zero. This helps maintain the correct positional value of digits within a number.