To solve
applications with subtraction, we will use the same plan that we used with addition. First, we need to determine what we are asked to find. Then we write a phrase that gives the information to find it. We translate the phrase into math notation and then simplify to get the answer. Finally, we write a sentence to answer the question, using the appropriate units.
The temperature in Chicago one morning was
$73$ degrees Fahrenheit. A cold front arrived and by noon the temperature was
$27$ degrees Fahrenheit. What was the difference between the temperature in the morning and the temperature at noon?
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.
$73-27$
Then we do the subtraction.
Write a sentence to answer the question.
The difference in temperatures was 46 degrees Fahrenheit.
The high temperature on
$\text{June}\phantom{\rule{0.2em}{0ex}}{1}^{\text{st}}$ in Boston was
$77$ degrees Fahrenheit, and the low temperature was
$58$ degrees Fahrenheit. What was the difference between the high and low temperatures?
The weather forecast for June
$2$ in St Louis predicts a high temperature of
$90$ degrees Fahrenheit and a low of
$73$ degrees Fahrenheit. What is the difference between the predicted high and low temperatures?
A washing machine is on sale for
$\text{\$399}.$ Its regular price is
$\text{\$588}.$ What is the difference between the regular price and the sale price?
Solution
We are asked to find the difference between the regular price and the sale price.
Write a phrase.
the difference between 588 and 399
Translate to math notation.
$588-399$
Subtract.
Write a sentence to answer the question.
The difference between the regular price and the sale price is $189.
A television set is on sale for
$\text{\$499}.$ Its regular price is
$\text{\$648}.$ What is the difference between the regular price and the sale price?
Write the numbers so each place value lines up vertically.
Subtract the digits in each place value. Work from right to left starting with the ones place. If the digit on top is less than the digit below, borrow as needed.
Continue subtracting each place value from right to left, borrowing if needed.
Check by adding.
Practice makes perfect
Use Subtraction Notation
In the following exercises, translate from math notation to words.
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
Carole
I'm 13 and I understand it great
AJ
I am 1 year old but I can do it! 1+1=2 proof very hard for me though.
Atone
hi
Adu
Not really they are just easy concepts which can be understood if you have great basics. I am 14 I understood them easily.
Vedant
find the 15th term of the geometric sequince whose first is 18 and last term of 387
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=