Rounding

Rounding

Rounding Rules

• 4 or less, let it rest

• 5 or more, raise the score

• 
  

How to round

• Underline the desired place value

• Circle the number BEHIND

• follow the rules

• Every number behind the underline number turns to zero

Rounding rules

• Following the rules, round 32,125 to the nearest ten thousand

• Following the rules, round 199,900 to the nearest thousand

• try some on your own now

Multiple Choice

The ballpark recorded the attendance at the opening game as 48, 376. Round this number to the nearest thousand.

• 8,000

• 50,000

• 48,000

• 49,000

Multiple Choice

Willy collected 3,542 pop tops from aluminum cans. Round this number to the nearest thousand.

• 3,000

• 3,500

• 4,000

• 4,500

Key words for rounding

• about

• approximently

• estimate

Front load rounding

When the problem doesn't give you a place to round to, you will underline the first number and round to that place.

Example

Johnny plays the saxiphone at a fancy resturant for $175 per night. If Johnny plays three nights per week,, about how much does he make in all?

Multiple Choice

Barry has 262 baseball cards. Palmer has 423 football cars. About how many sports cards to they have altogether

• 695

• 700

• 600

• 800

Multiple Choice

Madison was playing fruit ninja. She earned 423 points in her first round and 245 points in her second round. About how many more points did she earn in her first rounds?

• 200

• 178

• 300

• 100

Multiple Choice

Keith was playing Plants vs. Zombies. His Peashooters shot 512 times on the first round and 987 on the second round. What is the approximate difference in peas shot?

• 475

• 600

• 500

• 400

Multiple Select

Which words are key words for rounding in words problems? Check all that apply.

• estimate

• about

• altogether

• difference

• approximately