Decimal Review

Decimal Review:

Adding, Subtracting, Multiplying and Dividing ​

By Ms. Lujano

Open Ended

How are you doing today?

Today, we will review how to add, subtract, multiply and divide decimals.

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Objective:

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STEP 1: Line up your decimals

​Adding Decimals

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​STEP 1: Line up your decimals

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STEP 2: Place the decimal point in line with the others.

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​Adding Decimals

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​STEP 1: Line up your decimals

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STEP 2: Place the decimal point in line with the others.

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STEP 3: ADD ​

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​Adding Decimals

Let's Practice!

Fill in the Blank

Solve:

$$2.2$$  + 4.4 

Fill in the Blank

Solve:

4.7 + 1.1 =

Multiple Choice

Solve:

$$2.952\$$  + $$39.24$$  

• 42.192

• 6.876

• 42.76

• 36.2

Poll

Are you able to add decimals?

• I understand this and can teach others

  😁

• I understand this but need more practice

  😌

• I still need help

  🤨

• I do not understand this at all

  🙁

Subtracting Decimals

​STEP 1: Line up your decimals

Subtracting Decimals

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​STEP 1: Line up your decimals

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STEP 2 : Place the decimal point in line with the others.

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Subtracting Decimals

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​STEP 1: Line up your decimals

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STEP 2 : Place the decimal point in line with the others.

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STEP 3: Subtract​

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Let's Practice!

Fill in the Blank

Solve:

$$8.4$$  - $$4.1$$  =

Multiple Choice

Solve:

$$24.6-21.9=$$  

• 46.5

• 2.7

• 27

• 4.665

Multiple Choice

Solve:

$$10$$ -  $$3.58$$  =

• 6.42

• 3.4

• 348

Poll

Are you able to subtract decimals?

• I understand this and can teach others

  😁

• I understand this but need more practice

  😌

• I still need help

  🤨

• I do not understand this at all

  🙁

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STEP 1: Multiply the numbers​

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​Multiplying Decimals

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STEP 1: Multiply the numbers​

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STEP 2: COUNT the number of decimal places

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​Multiplying Decimals

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STEP 1: Multiply the numbers​

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STEP 2: COUNT the number of decimal places

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STEP 3: Place the decimal the SAME number of swoops you counted​

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​Multiplying Decimals

Let's Practice!

Multiple Choice

Solve:

$$9.5\ \times3\ =$$  

• 28.5

• 2850

• 12.5

Multiple Choice

Solve:

$$3.4\ \times10$$  

• 34

• 3.4

• 3400

• 13.4

Multiple Choice

Solve:

$$0.4\times1.8=$$  

• 2.2

• 0.72

• 72

Poll

Are you able to multiply decimals?

• I understand this and can teach others

  😁

• I understand this but need more practice

  😌

• I still need help

  🤨

• I do not understand this at all

  🙁

​STEP 1: Divisor needs to be a WHOLE number. Move the decimal to the right until it becomes a whole number.

Dividing Fractions

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​STEP 1: Divisor needs to be a WHOLE number. Move the decimal to the right until it becomes a whole number.

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STEP 2: DIVIDE​

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Dividing Fractions

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​STEP 1: Divisor needs to be a WHOLE number. Move the decimal to the right until it becomes a whole number.

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STEP 2: DIVIDE​

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STEP 3: Place the decimal above the decimal point in the dividend. ​

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Dividing Fractions

Let's Practice!

Multiple Choice

Solve:

$$9.5\div5$$  

• 190

• 1.9

• 9

Multiple Choice

Solve:

$$4.8\div2=$$  

• 2.4

• 2.8

• 8

Multiple Choice

Solve:

$$5.4\div0.2=$$  

• 27

• 3

• 7

Poll

Are you able to divide decimals?

• I understand this and can teach others

  😁

• I understand this but need more practice

  😌

• I still need help

  🤨

• I do not understand this at all

  🙁

Open Ended

Do you have any final questions or concerns?

ALL DONE! Great Job!