Big Ideas Chapter 2 review 7th grade

Big Ideas Chapter 7 review 7th grade

Rational Numbers

• Rational numbers are numbers that can be expressed as a fraction or a decimal

Multiple Choice

What are rational numbers?

• integers

• whole numbers

• numbers that can be expressed as a fraction or decimal.

• All of the above

Rational Numbers include

• Whole numbers-1,2,3,4,5

• Integers- -1, 0, 1

• Decimals 0.4, 1.4

• Fractions

   $\frac{1}{2}$  ,  $\frac{3}{4}$  

Multiple Choice

Is      a rational number

 $\frac{4}{5}$  

• Yes

• no

Multiple Choice

Is -150 a rational number?

• Yes

• no

Place Value

• It is important to understand place value when converting fraction into decimals, or decimals into fractions.

• When we are working with decmials, our place value is 10ths, 100ths, thousandths etc.

• This means that a decimal can be represented as a fraction with a denominator of 10, 100, or 1000

• When asked to convert a decimal into a fraction it is important to know the place value, to help you determine the denominator.

• When converting a fraction into a decmial, you will need to make sure your fraction has a denominator of 10, 100. or even 1000. You will need to know how to use factors and multiples.

Example. Write

 $4\ \frac{3}{5}$  as a decimal

• Because 4 is my whole number, my decimal will start with 4.

• I know i have  $\frac{3}{5}$  

• I need this fraction to have a base of 10 to convert it into a fraction.

• If i multiply the fraction by  $\frac{2}{2}$  I will get a denominator of 10, and the fraction  $\frac{6}{10}$  

• I would say this as four and six tenths, and write my fraction as 4.6.

Open Ended

You try.
Write

 $3\ \frac{1}{4}$  as a decimal

Example. Write

 $\frac{17}{3}$  as a decimal

• How many times does 3 go into 17? 5. so my decimal will start with 5.??

• I am left with  $5\ \frac{2}{3}$  

• One trick if you know that  $\frac{1}{3}$  is .33, then  $\frac{2}{3}$  =.66

Multiple Choice

Write .60 as a fraction in simpliest form.

• $\frac{3}{10}$

• $\frac{6}{10}$

• $\frac{60}{100}$

Open Ended

 $-\frac{3}{10}+\frac{4}{10}=$  

Open Ended

If I ate

 $\frac{4}{6}$  slices of pie, how many slices are left, and write that as a fraction in simpliest terms.