Comparing fractions
To compare fractions, use common denominators or compare to a benchmark like 1/2. For 2/3 and 3/5: 10/15 and 9/15, so 2/3 is greater.
Try it: Which is greater, 3/4 or 5/8?
Show answer
3/4, because 6/8 is greater than 5/8.
Grade 4
Lessons by subject. Read the lesson, try the question, then check your answer.
Topics follow the Georgia Standards of Excellence, the state's current standards (they replaced the older Common Core Georgia Performance Standards). This is an unofficial study aid, not a Coffee County Schools resource. Your teacher's pacing guide and textbook come first. Official standards: georgiastandards.org.
Math
Number and Operations: Fractions
Adding and subtracting with like denominators
Keep the denominator and add or subtract the numerators. 3/8 + 2/8 = 5/8.
Try it: What is 7/10 − 3/10?
Show answer
4/10, which simplifies to 2/5.
Operations and Base Ten
Multiplying multi-digit numbers
Break the number apart. 23 × 4 = (20 × 4) + (3 × 4) = 80 + 12 = 92.
Try it: What is 31 × 5?
Show answer
155, because (30 × 5) + (1 × 5) = 150 + 5.
Factors and multiples
Factors multiply to make a number. The factors of 12 are 1, 2, 3, 4, 6, and 12. Multiples are what you get when you count by a number.
Try it: List the first three multiples of 7.
Show answer
7, 14, 21.
Geography
Physical Geography of the United States
Major landforms
The Appalachian Mountains are in the east and the Rocky Mountains are in the west. Between them lie large plains.
Try it: Which mountains are in the eastern United States?
Show answer
The Appalachian Mountains.
Rivers and lakes
The Mississippi River flows south to the Gulf of Mexico. The five Great Lakes are Superior, Michigan, Huron, Erie, and Ontario.
Try it: Name one of the Great Lakes.
Show answer
Any of Superior, Michigan, Huron, Erie, or Ontario.
People and Places
Why people settle where they do
People often settle near water, fertile soil, and transportation routes. Rivers helped with travel, drinking water, and farming.
Try it: Why might people settle near a river?
Show answer
For water, farming, and travel.
Moving to a new place
Push factors make people leave a place, such as a lack of jobs. Pull factors draw them to another place, such as good schools.
Try it: Is a job opening in a new city a push or a pull factor?
Show answer
A pull factor.
Language Arts
Reading Informational Text
Main idea and summary
The main idea is what the text is mostly about. A summary uses your own words to give the main idea and the most important details.
Try it: What should a summary include?
Show answer
The main idea and key details, in your own words.
Firsthand and secondhand accounts
A firsthand account is written by someone who was there. A secondhand account is told by someone who learned about it from others.
Try it: Is a diary entry about a storm a firsthand or secondhand account?
Show answer
Firsthand, if the writer lived through the storm.
Writing
Opinion writing
State your opinion, give reasons, and use linking words like because and for example. End with a concluding sentence.
Try it: Write one reason for this opinion: Our class should have a garden.
Show answer
Sample answer: A garden teaches students how plants grow.
Dialogue in narratives
Use quotation marks around a speaker's exact words, and start a new paragraph when a new person speaks.
Try it: Add quotation marks to the spoken words: Come here, said Mom.
Show answer
“Come here,” said Mom.