Base 10 Blocks

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# Base 10 Blocks - PowerPoint PPT Presentation

Base 10 Blocks. Kris Smeester April 21, 2004. What are Base 10 Blocks?. Base 10 blocks are a way to represent numbers with blocks. Remember, there are different size blocks that can represent numbers. You can use a unit, a long, or a flat.

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Presentation Transcript

### Base 10 Blocks

Kris Smeester

April 21, 2004

What are Base 10 Blocks?

Base 10 blocks are a way to represent numbers with blocks. Remember, there are different size blocks that can represent numbers. You can use a unit, a long, or a flat.

unit long flat

So, what do the blocks represent?

Base 10 blocks show us how many units are included in each block.

-A cube represents 1 unit.

-A long is equal to 10 units.

-A flat is equal to 100 units.

How can we use Base 10 Blocks?

We can use Base 10 Blocks in adding and subtracting numbers. Using Base 10 Blocks can make addition and subtraction much easier to understand. Let’s look at some problems.

We can use Base 10 Blocks for Addition:

25

+_____+_13_

38

Sample Subtraction Problem

We can also use Base 10 Blocks for subtraction:

25

-_ ____-_ 13__

12

Remember that when we have too many units, we have to trade them for a long.

=

When we have 10 longs, we have to trade them for a flat.

=

63

+________ 43

106

Remember, that when there are 10 longs, we must trade them for a flat. When subtracting, we can trade the flats in for longs, and the longs in for units. It is similar to carrying.

Overview

Now that we have learned what Base 10 Blocks are, we can take the quiz. If you need more help with Base 10 Blocks, here are some helpful sites that you may find interesting:

-Learning Base 10 Blocks- Learn how to trade Base 10 blocks for numbers.

-Counting Base 10 Blocks-Group the blocks together to make longs or flats.

-Base 10 Block Practice-Click on the link to get practice using Base 10 Blocks.