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Example 1.37 from Prealgebra, 1.3 Subtract Whole Numbers
Subtract Whole Numbers: example 1.37
The temperature in Chicago one morning was degrees Fahrenheit. A cold front arrived and by noon the temperature was degrees Fahrenheit. What was the difference between the temperature in the morning and the temperature at noon?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
We are asked to find the difference between the morning temperature and the noon temperature.
Write a phrase. the difference of 73 and 27 Translate to math notation. Difference tells us to subtract. Then we do the subtraction. Write a sentence to answer the question. The difference in temperatures was 46 degrees Fahrenheit.
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
The high temperature on in Boston was degrees Fahrenheit, and the low temperature was degrees Fahrenheit. What was the difference between the high and low temperatures?
How did it go?