Open Number Line

Front

What is an open number line?

Back

An open number line is a straight line that represents numbers without specific marks or labels. It helps us visualize addition and subtraction.

Tags

CCSS.2.NBT.B.7

Front

How do you use an open number line to add numbers?

Back

To add numbers on an open number line, start at the first number and make jumps to the right for each number you add.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

How do you use an open number line to subtract numbers?

Back

To subtract numbers on an open number line, start at the first number and make jumps to the left for each number you subtract.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

What is the total number of books left in the library if 867 books were there and 453 were checked out?

Back

414 books are left in the library.

Tags

CCSS.3.OA.D.8

Front

If Clark bought 2 bags of pretzels with 200 pretzels each and 1 bag of peanuts with 153 peanuts, how many snacks did he buy in total?

Back

Clark bought 553 snacks in total.

Tags

CCSS.3.OA.D.8

Front

What is the total number of pencils if Mrs. Miner has 139 and Ms. Carson has 45 more?

Back

Mrs. Miner and Ms. Carson have 323 pencils altogether.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What does 'addition' mean in math?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Tags

CCSS.1.OA.A.1

Front

What does 'subtraction' mean in math?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Tags

CCSS.2.OA.A.1

Front

What is a 'sum'?

Back

A sum is the result of adding two or more numbers together.

Tags

CCSS.1.OA.A.1

Front

What is a 'difference'?

Back

A difference is the result of subtracting one number from another.

Tags

CCSS.7.NS.A.1C