Transcript Multiplying and Dividing Decimals by 10, 100, and 1,000

Warm-up (on page ) Answer
the following question in
complete sentences.
Think about multiplying. What is true
about the product (answer)? How does
it compare to the numbers that you are
multiplying together? Give an example.
Think about dividing. What is true about
the quotient? How does it compare to
the dividend and the divisor? Give an
example
Multiplying and Dividing
Decimals by 10, 100,
and 1,000
On page
The Basics of Multiplying:
• When you multiply by 10, 100, or 1,000, you
can move the decimal point to the right.
• The number of decimal places you move is
the same as the number of zeroes you are
multiplying by.
Ex 1) 1.492 x 100
Move the decimal to the right:
two spaces.
149.2
Ex 2)15.36 x 1,000
Move the decimal point to the
right: three spaces. Add a zero
for the third space.
15,360
The Basics of Dividing:
• When you divide by 10, 100, or 1,000, you
can move the decimal point to the left. Move
the decimal point once for each zero you are
dividing by.
Ex 3) 2,124.94 ÷ 1,000
Move the decimal to the left: three
spaces.
2.12494
Ex 4) 4.2 ÷ 100
Move the decimal point to the left: two
spaces. Add a zero for the second space.
.042
Complete the
Classwork on
page 15. Raise
your hand when
you are done so
that you can be
checked off. Once
you are finished,
you may start on
your homework.