# 1.3 Subtract whole numbers  (Page 4/6)

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Translate and simplify:

1. the difference of $14$ and $9$
2. subtract $21$ from $37$
1. 14 − 9 = 5
2. 37 − 21 = 16

Translate and simplify:

1. $11$ decreased by $6$
2. $18$ less than $67$
1. 11 − 6 = 5
2. 67 − 18 = 49

## Subtract whole numbers in applications

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 difference is 19 degrees Fahrenheit.

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?

The difference is 17 degrees Fahrenheit.

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? The difference is$149.

A patio set is on sale for $\text{149}.$ Its regular price is $\text{285}.$ What is the difference between the regular price and the sale price?

The difference is $136. ## Access additional online resources ## Key concepts Operation Notation Expression Read as Result Subtraction $-$ $7-3$ seven minus three the difference of $7$ and $3$ • Subtract whole numbers. 1. Write the numbers so each place value lines up vertically. 2. 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. 3. Continue subtracting each place value from right to left, borrowing if needed. 4. Check by adding. ## Practice makes perfect Use Subtraction Notation In the following exercises, translate from math notation to words. #### Questions & Answers where we get a research paper on Nano chemistry....? Maira Reply nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review Ali what are the products of Nano chemistry? Maira Reply There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others.. learn Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level learn Google da no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts Bhagvanji hey Giriraj Preparation and Applications of Nanomaterial for Drug Delivery Hafiz Reply revolt da Application of nanotechnology in medicine what is variations in raman spectra for nanomaterials Jyoti Reply ya I also want to know the raman spectra Bhagvanji I only see partial conversation and what's the question here! Crow Reply what about nanotechnology for water purification RAW Reply please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment. Damian yes that's correct Professor I think Professor Nasa has use it in the 60's, copper as water purification in the moon travel. Alexandre nanocopper obvius Alexandre what is the stm Brian Reply is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.? Rafiq industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong Damian How we are making nano material? LITNING Reply what is a peer LITNING Reply What is meant by 'nano scale'? LITNING Reply What is STMs full form? LITNING scanning tunneling microscope Sahil how nano science is used for hydrophobicity Santosh Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq Rafiq what is differents between GO and RGO? Mahi what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq Rafiq if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION Anam analytical skills graphene is prepared to kill any type viruses . Anam Any one who tell me about Preparation and application of Nanomaterial for drug Delivery Hafiz what is Nano technology ? Bob Reply write examples of Nano molecule? Bob The nanotechnology is as new science, to scale nanometric brayan nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale Damian Is there any normative that regulates the use of silver nanoparticles? Damian Reply what king of growth are you checking .? Renato What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ? Stoney Reply why we need to study biomolecules, molecular biology in nanotechnology? Adin Reply ? Kyle yes I'm doing my masters in nanotechnology, we are being studying all these domains as well.. Adin why? Adin what school? Kyle biomolecules are e building blocks of every organics and inorganic materials. Joe 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. Kimberly Reply 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.
What is the expressiin for seven less than four times the number of nickels
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how do you translate this in Algebraic Expressions
why surface tension is zero at critical temperature
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