Adding and Subtracting Whole Numbers - 4th Grade

Front

What is addition?

Back

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

Front

What is subtraction?

Back

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

Front

What is the equation to find the number of items left after using some?

Back

The equation is: Total items - Used items = Remaining items.

Front

If Seema had 315 popsicle sticks and used 92, how many does she have left?

Back

315 - 92 = 223 popsicle sticks left.

Front

What is the purpose of estimating in math?

Back

Estimating helps to quickly find an approximate answer without calculating the exact number.

Front

How do you estimate the sum of 407,849 and 28,618?

Back

Round 407,849 to 408,000 and 28,618 to 29,000, then add: 408,000 + 29,000 = 437,000.

Front

What is a number sentence?

Back

A number sentence is a mathematical statement that includes numbers and an operation (like + or -) to show a relationship.

Front

How do you solve for an unknown in an equation?

Back

To solve for an unknown, isolate the variable on one side of the equation using inverse operations.

Front

What is the total cost if each item costs $60 and 4 items are bought?

Back

Total cost = 4 items x $60/item = $240.

Front

What is the equation to find the total pages read if you know the pages of two books and the total?

Back

Total pages = Pages of Book 1 + Pages of Book 2 + Pages of Book 3.