MODULE #3 REVIEW

CAN I MULTIPLY

DECIMALS?

ANNA HAS A WATER BOTTLE THAT HOLDS 0.22 LITERS OF WATER.SHE DRINKS 3 BOTTLES OF WATER DURING THE SCHOOL DAY. WHICH MODEL CAN BE USED TO SHOW HOW MUCH WATER SHE HAS DRANK TODAY?

                 

                 

                 

                 

                 

                 

                 

                 

                 

                 

                   

                   

                   

                   

                   

                   

                   

                   

                   

                   

The answer is the picture on the right, 3 sets of 0.22 = 0.66

NICOLE AND SALLY GO SHOPPING Nicole spends $15.74 on school

supplies. Sally spends 4 times as much as Nicole. How much does Sally spend?

HERE’S THE ANSWER… $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.

CAROL LOVES TO DO CRAFTS, SO SHE USED 0.48 METER OF RIBBON. DENISE USES 10 TIMES AS MUCH AS CAROL. HOW MUCH RIBBON DOES DENISE USE?

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

CHARESSE DRIVES 8.35 MILES TO SCHOOL EACH DAY. IF SHE DRIVES TO SCHOOL FOR 5 DAYS. HOW MANY MILES HAS SHE DRIVEN?

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.

DISTRIBUTIVE PROPERTY

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.

My answer should be 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

EXPANDED FORM… 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 find an answer when it is an expression.

ELIZABETH MULTIPLIES 3.5 X 1.73. SHE NEEDS TO FIND THE PLACE VALUE OF THE DECIMAL IN THE PRODUCT

First, I need to solve the problem, because the PRODUCT is the answer to a 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

TINA HIKED 1.8 MILES. BECKY HIKED 4 TENTHS OF TINA. THIS MODEL SHOWS HOW FAR BECKY HIKED?

DEBBIE DREW A MODEL TO SOLVE FOR THE PRODUCT OF A DECIMAL AND A WHOLE NUMBER.

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 answer is C

JANET MEASURES AN AREA OF .36 SQUARE INCH. SHE USES 100 CERAMIC TILES TO DESIGN HER ART PROJECT. WHICH EQUATION CAN JANET USE TO FIND THE AREA OF HER DESIGN COVERED BY THE TILES.

A. 100 X .36 = 36 B. 10 X 3.6 = 36 C. 10 X 36 = 360 D. 100 X 0.36 – 3.6

The answer is A

JUDY HAS $6.78. BROOKE HAS 3 TIMES AS MUCH MONEY AS JUDY. DRAW A MODEL TO SHOW THIS.

Judy

Brooke

$6.78

$6.78 $6.78 $6.78

PURPLE PAINT WAS USED TO PAINT 1/10 OF A 2,844 SQUARE FOOT MURAL. WHICH EQUATION SHOWS THIS?

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 Answer is A.

WHAT IS THE MULTIPLICATION PROBLEM FOR THIS QUICK PICTURE?

The answer is 2 X 0.22