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Week 3 Lesson 8
Place Value Charts
Place Value CHarts
Recently we have been looking at the standard algorithm for addition.
The standard algorithm is also called vertical form.
Here we have 34 + 18 in vertical form or in the algorithm:
34
+18
Now we’ll model it by drawing a place value chart.
Place
Value Chart
Place Value CHarts
Ok, let’s regroup!
Place value charts
We made a ten.
We can circle it!
Bundle ten ones, and put a ten in the tens place.
Let’s show the new unit below the tens place.
When we use the algorithm or vertical form we create a ten and move it to the tens place.
Example 2
Let’s look at this problem.
134 + 18
First, we will write 134 + 18 in the algorithm or vertical form. We will be sure to line up the ones and tens.
134
+18
Now let’s draw a place value chart with hundreds, tens, and ones
Here we can see how our 12 ones, become a new ten and we leave 2 ones in the 1's place.
Example 2
Example 2
Let’s regroup starting with the one’s:
Write a 1 on the line above the tens place and write 2 under the line below the ones place.
example 2
OK let’s add the tens:
3 tens + 1 ten + 1 ten is 5 tens.
So, we record 5 below the line in the tens place.
Now let's record the hundreds.
Question example:
Before I sign off I wanted to show you an example of how to answer a question using place value charts:
Example question 3
1
1111
1111
111
1111
111
11111
1
I've shown the new ten in green in the place value chart.