Divide with decimals

Standard UW.GAP.5.M.NBT.07 Add, subtract, multiply, and divide decimals to hundredths using concrete models or drawing and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

Essential Questions1. What is addition? How do you add decimals?

2. What is subtraction? How do you subtract decimals?

3. What is multiplication? How do you use a model and partial products to represent multiplying decimals?

4. What is division? How do you use a model and partial products to represent dividing decimals?

Set....

Think about the strategies we use to divide whole numbers....

Take turns with your face partner and describe how we multiply and divide whole numbers.

Objective

I can divide decimals to hundredths place.

Decimal - a number with a fraction of tenths, hundredths, etc. written after a decimal point.

Decimal point - the (.) between a whole number and fractions of tenths, hundredths, thousandths, etc.

Digit- any of the numerals 0-9, which may be part of a larger number.

24.56 x 4 . 1 = 100.696

Let’s Review Again

Rules for Dividing Decimals

To divide decimals, divide as you would with a normal whole

number then you move over the decimal.

Dividing Decimals

Example 2Solve = 2.25 2.5

2.5)2.25 Estimate, Multiply, Subtract, Bring Down, Start again/Stop

DividendDivisor

Dividing DecimalsExample 2

Solve = 2.25 2.5

02.5)2.25

-0 225

Divide as with whole numbers.

Dividing DecimalsDivide as with whole numbers.

Move decimal from 2.5 (divisor) over 1 to “get rid of i

t”

Move the decimal over that same amount of spaces in the

dividend.

Then move decimal straight up.

Example 2Solve = 2.25 2.5

0.925)22.5 -0 225 -225 0

Answer: 0.9

Now let’s try one together

.46

Now you do one

15.2

Lesson on Dividing Decimals

http://learnzillion.com/lessons/561-divide-decimals-using-knowledge-of-multiplication

You and a partner try...

Using what you learned in the lesson, using pictures, models, and properties of operations solve this problem with your partner...

26.4 ÷ .03

ClosureThink about what is different about dividing whole numbers and dividing decimals

Write a $2 summary explaining what is different

Repeat todays objective

Let’s watch a fun video about dividing

decimals

http://www.youtube.com/watch/?v=iWU6K3GV2A8

Independent Practice!!! (yay)

1) 1.269 ÷ .03 =

2) 25.505 ÷ 05 =

3) .1824 ÷ .6 = 4) 243.6 ÷ 1.2 =

5) 18.72 ÷ .9 =

6) 50.70 ÷ 1.0 =

7) 168.56 ÷ .08 =

8) 48.164 ÷ .4 =