# MODULE #3 REVIEW

CAN I MULTIPLY
DECIMALS?
The answer is the picture on the right,
3 sets of 0.22 = 0.66
 Nicole
spends \$15.74 on school supplies.
Sally spends 4 times as much as Nicole. How
much does Sally spend?
 \$15.74
X 4 = \$20 x 4 = \$80 as an estimate.
 \$15.74
X
4
 _______
 \$62.96
 So, Sally spends \$62.96 on school supplies. I
hope she shares with everyone else.
I
know that if I
multiply by 10, I
will move the
decimal point one
place to the left. I
want my number
to get bigger.
 0.48
turns into
4.8.
 So, Denise uses 4.8
meters of ribbon
 8.35
x 5 = 8 x 5 as
an estimate, so
that is 40 miles.
 8.35
X 5
 ____
 41.75
 So, Chareese drive
41.75 miles in 5
days.
 Angela
knows that
3.4 grams = 1 dime.
She has 3 dimes.
How much do her 3
dimes weigh?
 3.4
x 3 = 3 x 3 as an
estimate, so that is
9 grams.
more than 9 grams,
but close.
 I can distribute 3
and 0.4.
 So, (3 x 3) + (3 x
0.4) = 9 + 1.2 =
 10.2 grams
I
need to show the
expanded form for
36 x 0.26 as an
expresssion.
 So, I can make 36
into 30 + 6.
 I can make 0.26
into .2 + .06
 Therefore,
 (30
+ 6) x (.2 +
.06) would be my
expression in
expanded form.
 I don’t need to
when it is an
expression.
 First,
I need to solve
the problem,
because the
PRODUCT is the
MULTIPLICATION
problem.
 My factors are 3.5
and 1.73
I
put 1.73 on top of
3.5 because it have
more digits.
 1.73
 X3.5
 _____
 6.055
 So the place value
of the decimal in
the product is
 thousandths
 What
does
Debbie’s model
show?
 0.2
0.04
 20
5
 A.
20.2 X 5.04
 B. 20.5 x 42
 C. 25 X .24
 D. 2.5 X 24
 The
 A.
100 X .36 = 36
 B. 10 X 3.6 = 36
 C. 10 X 36 = 360
 D. 100 X 0.36 – 3.6
 The
 Judy
\$6.78
 Brooke
\$6.78
\$6.78
\$6.78
 A.
0.1 X 2,844 = 284.4
 B. 0.001 X 2,844 = 2.844
 C. 10 X 2,844 = 28,440
 D. 1.0 X 2,844 = 2m844
 The