Open Number Line

Front

What is an open number line?

Back

An open number line is a straight line that represents numbers in order, where you can place numbers anywhere on the line without specific marks.

Front

How do you find the total number of items when combining two groups?

Back

You add the number of items in each group together.

Front

If you have 867 books and 322 are checked out, how do you find out how many are left?

Back

Subtract the number of checked out books from the total number of books: 867 - 322.

Front

What is the first step to solve the problem: 139 pencils and 45 more pencils?

Back

First, find out how many pencils Ms. Carson has by adding 45 to 139.

Front

How do you calculate the total number of pretzels if you have 2 bags with 200 pretzels each?

Back

Multiply the number of bags by the number of pretzels in each bag: 2 x 200.

Front

What does 'altogether' mean in a math problem?

Back

'Altogether' means to find the total amount by adding numbers together.

Front

If you have 131 more books checked out after 322, how do you find the total checked out?

Back

Add the two amounts of checked out books: 322 + 131.

Front

What is subtraction?

Back

Subtraction is taking one number away from another to find the difference.

Front

What is addition?

Back

Addition is combining two or more numbers to find the total.

Front

How do you represent the number 414 on an open number line?

Back

You would place a point at 414 on the line, showing its position relative to other numbers.