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

Fill in the Blanks

Estimate the product of 12 and 5?

No exact answers. Estimate.

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

Fill in the Blanks

Round the number 23.54 to the nearest TENTHS place

Fill in the Blanks

Attendance for two baseball games are shown below. What is the total (sum) of both games after rounding to the nearest thousand?

Monday = 29,471

Tuesday = 23,580

Fill in the Blanks

1.534 inches of rainfall was recorded in Liberty last week. What was the amount rounded to the nearest tenth of an inch?

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!