Multiplying By Hundreds Math Worksheet

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CHAPTER 6
CHAPTER 6
You will need
4
4
• a place value chart
Multiplying
• counters
by Hundreds
Use multiplication facts and regrouping to
Goal
multiply by hundreds.
Each of Tara’s digital photos contains a different number of pixels
arranged in an array. Each pixel has one colour. In the 4
6 array,
or 4-by-6 image, you can actually see the 24 pixels. In the 10-by-
15 image, it is more difficult to see and count the 150 pixels.
In the other photos, you cannot see or count the pixels.
6
15
300
500
600
4
10
200
300
400
?
How many pixels are in each image?
Tara’s Calculation
There are 200 rows of 300 pixels
Thousands
Ones
in a 200-by-300 image. To calculate
Hundreds
Tens
Ones
Hundreds
Tens
Ones
the number of pixels, I need to
calculate 200
300. I first represent
300 on a place value chart.
To multiply any number by 200, I can
Thousands
Ones
multiply by 100 first and then multiply
Hundreds
Tens
Ones
Hundreds
Tens
Ones
the product by 2. To multiply 300 by
100 on a place value chart I move the
3 counters two columns to the left.
To multiply that product by 2, I double
Thousands
Ones
the number of counters.
Hundreds
Tens
Ones
Hundreds
Tens
Ones
174
NEL

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