Review Game Math 2/22/2022

Review Game Math 2/22/2022 Unit 2

By Steve Garces

​2.1 - Adding and Subtracting Fractions

​Adding

First you add the numerators

Then you leave the Denominators

If they have different denominators

you find the LCD and then what you multiply

at the top, you do it to the bottom. Then Add​

If you have mixed numbers, Change them into improper fractions​, then add

2.1 Adding and Subtracting Fractions

​Subtracting

​First you subtract the numerators

Then you leave the Denominators

If they have different denominators

you find the LCD and then what you multiply

at the top, you do it to the bottom. Then Subtract​

If you have mixed numbers, Change them into improper fractions​, then subtract​

Multiple Choice

$$\frac{2}{3}\ +\ \frac{2}{4}$$  

Add

• $$1\ \frac{1}{6}$$  

• $$1\ \frac{2}{6}$$  

• $$1\ \frac{6}{12}$$  

Multiple Choice

$$\frac{3}{4}\ -\ \frac{2}{4}$$  

Subtract

• $$\frac{1}{3}$$  

• $$\frac{2}{4}$$  

• $$\frac{1}{4}$$  

You have to keep the 1st fraction, change the ÷ to a ×​, Then flip the other fraction. Then multiply.

​Dividing

You multiply the ​Numerators together. Then multiply the denominators. Reduce and Simplify if you can. (Change to fractions if you are dealing with mixed fractions.

​Multiplying

2.2 Multiplying and Dividing Fractions​

Unit 2 Lesson 2​

Multiple Choice

$$\frac{2}{4}\ \times\ \frac{8}{9}$$  

Simplify

• $$\frac{9}{2}$$  

• $$\frac{4}{9}$$  

• $$\frac{1}{18}$$  

• $$\frac{\text{5}}{\text{7}}$$  

Multiple Choice

$$\frac{3}{4}\ \div\ \frac{1}{2}$$  

Divide

• $$\frac{1}{2}$$  

• $$2\ \frac{1}{2}$$  

• $$1\ \frac{3}{4}$$  

• $$1\ \frac{1}{2}$$  

2.3 Adding Decimals​

​Adding Decimals

To add decimals. Line them up. Get rid of the Decimals by jumping them out of the equation. Add. Then jump them back into the answer. ​

If you need to, add zeros as placeholders. ​

Multiple Choice

2.3 + 4.25

• 3.45

• 6.55

• 6.45

• 5.35

2.4 Subtracting Decimals

​Subtracting Decimals

To Subtract

• Line them up

• Jump decimals out (Or bring the decimal down)

• Subtract

• Jump decimals back in​

Add Zeros if you need to, as place holders

Multiple Choice

7.4 - 6.09

• 3.90

• 13.49

• 3.98

• 1.31

2.5 Multiplying Decimals

​MULTIPLY

​To multiply a decimal

• Set it up

• get rid of the decimals

• multiply

• Jump the decimals back in ​

Organize decimals the way you see them​

Multiple Choice

3.5 x 4.92

• 17.32
• 17.22
• 1.72
• 0.1722

1. No decimals in the divisor

2. jump decimals in the dividend how many times you did to the divisor.

3. Move up to the quotient and ÷​

​To Divide

1. You have to divide with no decimals

2. move them up into the quotient then divide​

2.6 Dividing Decimals​

bring and drop zeros if you need to and remember to put the decimal correctly​

Multiple Choice

1.8 ÷ 0.2

• 9
• 90
• 0.9
• 0.09

Multiple Choice

4.8 ÷ 0.6

• 8
• 0.8
• 13
• 1.3

​2.7 Comparing and Ordering Decimals

To compare decimals: you are finding which number or decimal is bigger or smaller. We use < > = to compare.

​

To order decimals: order them for least to greatest or from greatest to least​

<> = | Order

> Greater than < Less than =equal to​

Multiple Choice

Which symbol belongs in this inequality?

4.78 ___ 8.31

• Greater than

  >

• Less than

  <

• Equal to

  =

• Less than or equal to

  $$\le$$  

Open Ended

Order these decimals

8.4, 9.56, 1.22, 4.90, 13.4, 0.001