4th Grade Whole Number Addition and Subtraction CFA

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 an estimate?

Back

An estimate is a rough calculation of the value, number, quantity, or extent of something.

Front

How do you find the total of two numbers?

Back

To find the total of two numbers, you add them together.

Front

What does it mean to find the difference?

Back

Finding the difference means subtracting one number from another.

Front

What is a strip diagram?

Back

A strip diagram is a visual representation used to show the relationship between numbers, often used in addition and subtraction problems.

Front

If Erin has 12 pictures and twice as many from vacation, how many vacation pictures does she have?

Back

Erin has 24 vacation pictures (12 x 2 = 24).

Front

How do you calculate the total number of items?

Back

To calculate the total number of items, add the quantities of each item together.

Front

What is the purpose of using estimation in math?

Back

Estimation helps to quickly assess the size or amount of a number without calculating the exact value.

Front

If Isaías planted 521, 387, and 438 trees, how many trees did he plant in total?

Back

Isaías planted a total of 1,346 trees (521 + 387 + 438 = 1,346).