Addition and Subtraction Word Problems, Estimate

Front

What is addition?

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 is subtraction?

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 word problem in math?

Back

A word problem is a mathematical question that is presented in the form of a story or real-life scenario.

Tags

CCSS.2.OA.A.1

Front

How do you solve a word problem?

Back

1. Read the problem carefully. 2. Identify the numbers involved. 3. Determine what operation (addition or subtraction) to use. 4. Write an equation. 5. Solve the equation.

Tags

CCSS.3.OA.D.8

Front

What does it mean to estimate in math?

Back

Estimating means to find an approximate value rather than an exact answer, often by rounding numbers.

Front

If a library has 358 fiction books and 65 more autobiography books, how many autobiography books does it have?

Back

423

Tags

CCSS.3.OA.D.8

Front

What is the difference between two numbers?

Back

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

Tags

CCSS.1.OA.A.1

Front

If Mr. Tom has 384 pear trees and Mr. Raimi has 238, how do you find the difference?

Back

Subtract: 384 - 238 = 146.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, used to represent numbers visually.

Tags

CCSS.2.MD.B.6

Front

How can you use a number line to estimate?

Back

You can use a number line to see which whole numbers are closest to the numbers you are working with.