Concept 1010A (Computing, Estimating, and Rounding)

Unit 1 Concept 1010A

Algebra 1 ​

I will use properties of real numbers to compare, estimate, and compute sums, differences, products, and quotients.”

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What you will need:​​

• Calculator

• Notebook and pencil​

• Computer​

LNHS Algebra Essentials

Open Ended

How are you today? Give me one sentence about your current mood

Match

Essential Vocabulary for Unit 1

• Sum

• Product

• Quotient

• Difference

• Estimate

The answer to an addition problem

The answer to a multiplication problem

The answer to a division problem

The answer to a subtraction problem

A close guess

• The answer to an addition problem

• The answer to a multiplication problem

• The answer to a division problem

• The answer to a subtraction problem

• A close guess

Sum is the answer to an addition problem.

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3+8=11

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The sum of the angles equal 180.​

Sum

The difference is the answer to a subtraction problem.

11-8=3

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The difference of 8 and a number = 3

8-x=3​

Difference

Product

Quotient

An estimate is a careful guess. An approximate guess.

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Estimate the product of ​5 and 12?

Estimate

Match

Essential Vocabulary for Unit 1

• Sum

• Product

• Quotient

• Difference

• Estimate

The answer to an addition problem

The answer to a multiplication problem

The answer to a division problem

The answer to a subtraction problem

A close guess

• The answer to an addition problem

• The answer to a multiplication problem

• The answer to a division problem

• The answer to a subtraction problem

• A close guess

Multiple Choice

The sum of 5 and 12 is?

• 60

• 2.4

• 7

• 17

Multiple Choice

The quotient of 10 and 5

• 2

• 5

• 15

• 50

Multiple Choice

The product of 6 and 3

• 9

• 18

• 2

• 3

Multiple Choice

The difference of 10 and 2

• 20

• 12

• 8

• 5

When rounding it is important to follow the rules and understand its place value.

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Refer to our place value chart whenever needed

Rounding and it's Place Value

• Find the place you want to round.

• Look at the number to the right -->

  • It is in control!

• ​5 or above give it a shove!

• 4 or below let it go​

​Find the correct place Value!

Match

Match the number to its place value

25.68

• 2

• 5

• 6

• 8

Tens

Ones

Tenths

Hundredths

• Tens

• Ones

• Tenths

• Hundredths

Multiple Choice

A 7 ounce package of chocolate chips sells for $2.29. What is the cost per ounce rounded to the nearest cent?

Hint* Cent is always the hundredTH place. Think 100 pennies for a dollar.

Hint** When you see per it is likely division. In this case it is $/ounces

• $3.10 per ounce

• $0.32 per ounce

• $0.33 per ounce

• $3.05 per ounce

Using inequalities and comparing numbers.

• Greater than​ >

  • Greater than or equal to >​

• Less than​ <

  • Less than or equal to <​

The inequality sign EATS the larger number

​Comparing Numbers

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Multiple Choice

Comparing numbers

$$5.2\ \ \ \ \ \ \ \ 5.02$$  

• $$>$$  

• $$<$$  

• $$\ge$$  

• $$\le$$  

Multiple Choice

Comparing numbers

$$-5.2\ \ \ \ \ \ -5.02$$  

• $$>$$  

• $$<$$  

• $$\ge$$  

• $$\le$$  

Multiple Choice

Comparing numbers

$$\frac{3}{5}\ \ \ \ \ \ \ \frac{4}{5}$$  

• $$>$$  

• $$<$$  

• $$\ge$$  

• $$\le$$  

Multiple Choice

Comparing Numbers

$$\frac{7}{8}\ \ \ \ \ \ \frac{9}{20}$$  

• $$>$$  

• $$<$$  

• $$\ge$$  

• $$\le$$  

Poll

How did you do today on this lesson?

• No clue what is happening

• I got a little out of it

• Understood most of it

• Really easy!