Adding Three or More Numbers
Adding Three or More Numbers is a Grade 4 math skill in enVision Mathematics, Chapter 2: Fluently Add and Subtract Multi-Digit Whole Numbers. Students apply the associative and commutative properties to reorder and regroup addends to find sums of three or more multi-digit numbers efficiently.
Key Concepts
When adding three or more numbers, if the sum of the digits in a column is a two digit number (e.g., 24), write the ones digit (4) in the sum and regroup (carry) the tens digit (2) to the next place value column.
Common Questions
How do you add three or more numbers?
Use properties of addition to reorder and regroup addends to make friendlier numbers. Add column by column from right to left, carrying when needed, just like with two numbers.
What properties help when adding three or more numbers?
The commutative property lets you change the order of addends, and the associative property lets you regroup them. These allow you to pair up numbers that make tens or hundreds first.
What is an example of adding three numbers efficiently?
To add 247 plus 153 plus 612, you can first add 247 plus 153 to get 400, then add 400 plus 612 to get 1012.
Can you add three numbers in any order?
Yes. Because of the commutative and associative properties, you can add three or more numbers in any order and get the same sum.
What chapter covers adding three or more numbers in enVision Grade 4?
Adding three or more numbers is covered in Chapter 2: Fluently Add and Subtract Multi-Digit Whole Numbers in enVision Mathematics Grade 4.