Topic 5 Review

Topic 5 Review

Dividing Decimals

Topic 5 Skills

• Dividing decimals by powers of 10

• Estimating quotients with decimals

• Dividing decimals by whole numbers

• Dividing decimals by decimals

Multiple Choice

When dividing a decimal by a power of 10, which way should you move the decimal?

• <-- Left

• --> Right

Multiple Choice

Use mental math to find the quotient of

 $3.46\div10^1$  

• 34.6

• 0.346

Multiple Choice

Use mental math to find the quotient of

 $148.3\ \div100$  

• 1.483

• 0.1483

• 148,300

Multiple Choice

Use mental math to find the quotient of

 $5,913\div10^3$  

• 5.913

• 0.5913

• 5,913.000

Multiple Choice

Use mental math to find the quotient of

 $134.89\ \div10^2$  

• 13.489

• 1.3489

• 0.13489

Compatible Numbers are numbers that work well together. Use Compatible Numbers to estimate the quotients.

 $27.3\ \div7.1\ \ \$  

 $28\div7\ =\ 4$  

Multiple Choice

Choose the best way to estimate the quotient.

 $26.2\ \div\ 5\$  

•  $25\ \div\ 5\ =\ 5$  

•  $30\div5\ =6$  

Multiple Select

Choose the best way to estimate the quotient

 $49.6\ \div7.8\ =$  

•  $49\div7=7$  

•  $48\ \div\ 8=6$  

•  $50\div7\ =\ 7R1$  

Multiple Select

Choose the best way to estimate the quotient

 $121\ \div12.75$  

•  $120\div12\ =\ 10$  

•  $100\div10=\ 10$  

Multiple Select

Choose the best way to estimate the quotient

 $9.6\div0.91$  

•  $10\div1=10$  

•  $9\div9=1$  

Divide a decimal by a whole number

Remember the steps!

Put your decimal point in your answer first! Then.....

Divide

Multiply

Subtract

Bring up/down

Repeat

Multiple Choice

Find the quotient of

 $5.84\div4\ =$  

• 1.32

• 1.46

• 1.87

Multiple Choice

Find the quotient for

 $361.5\ \div\ 15$  

• 2.41

• 1.241

• 24.1

Divide a decimal by a Decimal

• First: Move the decimal in your divisor to make a whole number

• Second: Move the decimal in your dividend the same amount of times

• Third: Put your decimal in your answer

• Fourth: STart the steps to long division!

Multiple Choice

Find the quotient for

 $16.4\div0.8$  

• 20.5

• 2.05

Multiple Choice

Find the quotient for

 $136.5\div4.2$  

• 3.25

• 32.5