Multiplying By Hundreds Math Worksheet Page 2
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1
2A.
Why does moving the 3 counters two columns to the left
represent multiplying 300 by 100?
B.
What is the product of 300 and 100? Explain.
C.
Why did Tara double the number of counters?
D.
How many pixels are in a 200-by-300 image?
E.
Show how to use a place value chart to calculate the
number of pixels in the last two photos.
Reflecting
R e f l e c t i n g
1.
Why is multiplying a number by 200 the same as
multiplying it by 100 and then by 2?
2.
What happens to the place value of each digit when you
multiply by 100? Use 100
400 to explain your answer.
3.
How can you use mental math to multiply numbers in
the hundreds? Use 400
300 to explain your answer.
Checking
4.
Use mental multiplication to identify the image on the right
with the greater number of pixels. Explain your reasoning.
Practising
5.
Calculate.
a)
40
50
d)
100
500
700 x 800 pixels
b)
40
100
e)
600
900
c)
100
300
f)
5000
60
6.
Which amount is more money? Explain.
900
300
300
$10
$50
$100
bills
bills
bills
900 x 600 pixels
7.
A ream of paper contains 500 sheets.
How many sheets of paper are there in 60 reams?
8.
A 600-by-
image contains 120 000 pixels. What is the
value of
? Show your work.
175
NEL
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