Decomposing Addition

decomposing numbers

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The meaning

Decomposing Numbers by their place value is an easy skill to master. like the number 365. decompose that in your notebook.

​​Decomposing

​Once you know how to decompose it can be easy to add the numbers!

​​Adding

​Try this method with the number 125

The number 825 is in the Hundreds, tens, and ones place. You can use that to see how to decompose it

​​Place Value

This is a perfect example of how they decomposed the number 987 by place value. Now that they now that 987 is 900 +80 + 7 they can add more numbers to it!

​​987

In your notebook pick a number to decompose and decompose it by place value!

Notes

You can compose numbers by adding the parts together, For example : Compose the number 400+30+5. add the numbers together to get the answer!

​​Composing

In your note book write these down to compose a new number

30+2+500

900+6+20

​​Compose

Multiple Choice

Compose the number 400+20+4

• 424

• 454

• 442

• 244

Multiple Choice

Decompose the number 456 by place value

• 400+50+6

• 5+6+4

• 40+500+6

• 60+5+400

Multiple Choice

Decompose the number 843 by place value

• 80+3+40

• 400+30+4

• 8+4+3

• 800+40+3