572+?=673
To solve the given equation 572+?=673, follow these steps:
- Step 1: Convert mixed numbers into improper fractions to clarify the calculation.
The mixed number 572 is converted as follows:
The improper fraction becomes 5⋅7+2=737.
The mixed number 673 is converted as follows:
The improper fraction becomes 6⋅7+3=745.
- Step 2: Calculate the difference to find the missing number.
Since we need to find what 673 is when 572 is added to it, determine the difference:
Subtract the fraction 737 from 745:
745−737=78.
- Step 3: Convert the resulting improper fraction back to a mixed number.
The fraction 78 can be converted to the mixed number 171. This involves dividing 8 by 7, which yields a quotient of 1 with a remainder of 1.
Thus, the missing number is indeed 171.
The correct choice among the options provided is: 171