Unit 1 Review

Unit 1 Review

Estimation and Whole Number Operations

Estimation Strategies

• Front End Estimation: Looking at greatest place value and rounding based on that. Example: 49,865 + 13,509 ---> 50,000 + 10,000

• Clustering: Used when numbers all "cluster" around a certain amount. Example: 746 + 751 + 756 ---> 750 + 750 + 750

• Compatible Numbers: using numbers that are close to familiar amounts (think money). Example: 109 + 47 + 26 ---> 100 + 50 + 25

Multiple Choice

A jelly bean factory usually makes 885,320 jelly beans per month. In the month before Halloween, it makes 1,040,982 more than that. About how many jelly beans does the factory produce in that month? Choose the best estimate

• 1,800,000

• 1,900,000

• 2,000,000

• 1,885,000

Multiple Choice

Estimate. 272 X 5=

• 1,000

• 1,300

• 1,500

• 2,000

Multiplication of Whole Numbers

• Start with the bottom factor with the place value farthest to the right. Multiply the digit by each digit of the top factor, starting on the right and moving left until you multiply by all of the numbers.

• Do not forget to drop your zero when you move to the next digit of the bottom factor.

• Add your partial products together while making sure your place values are lined up nicely.

Multiple Choice

The 5th grade class at Greenways Intermediate School sold more chocolate bars than any other class. They ordered 576 boxes of chocolate. Each box held 24 chocolate bars. How many chocolate bars did they sell?

• 13,818

• 3,456

• 13,824

• 13,248

Multiple Choice

A theater can seat 460 people at one time. If a movie in the theater fills every seat, every day for 3 weeks, how many tickets were sold?

• 1,380

• 9,660

• 9,200

• 13,800

Long Division of Whole Numbers

• Set up your problem with the dividend "inside the house" and the divisor "outside the house".

• Make your multiple list using repeated addition of your divisor.

• Follow the division steps: Divide, Multiply, Subtract, Check, Bring Down

• Make sure there is a digit above each digit of your dividend to ensure your quotient is complete.

Multiple Choice

Eli bought 880 green slimy candy bars. He wanted to divide the candy evenly for his 12 kids. How many candy bars would each kid get, and how many would be left over?

• Each kid would get 73 green slimy candy bars and none would be left over.

• Each kid would get 75 green slimy candy bars and none would be left over.

• Each kid would get 4 green slimy candy bars and 73 would be left over.

• Each kid would get 73 green slimy candy bars and 4 would be left over.

Multiple Choice

The Oregon Trail is 2,197 miles long. How long would it take a covered wagon traveling 20 miles a day to complete the trip? (round up)

• 100 days

• 110 days

• 95 days

• 120 days