EnVision Math

Topic 2:

Lesson 2-3

Problem Solving:

Missing or Extra Information

2010-11

Ryan and Ariana Chelsie and Allison

Maryan and Brandon Saul and Jayla

Meadow and Mikayla Cameron, Jadyn & Ryan V.

Matthew and Nicholas

Elijah and Chase

What strategies

can I use to solve word problems?

Read and Understand

? What am I trying to find out?

? What do I know?

Plan and Solve

? What strategy or strategies should I try?

? What is the answer?

Look Back and Check

? Did I answer the question?

? Does my answer make sense?

For breakfast, Liz can eat cereal, eggs, or pancakes. She can drink orange juice, apple juice, or milk. How many breakfast choices does she have?

cereal – orange juice eggs – orange juice pancakes – orange juice

cereal – apple juice eggs – apple juice pancakes – apple juice

cereal – milk eggs – milk pancakes - milk

Make an Organized List

Read and Understand

Plan and Solve

Look Back and Check

Liz has 9 breakfast choices.

Mark has $45. Nora has $40. How much money will Mark have left after he buys a CD for $15?

Read and Understand

Plan and Solve

Look Back and Check

Ignore Extra Information

$45 15-

03$

Mark has $30 left.

At the zoo, Julie saw 18 penguins. She saw 8 Adelie penguins. The rest of the penguins she saw were Rockhopper penguins. She learned that Rockhopper penguins grow to be about 5 to 8 pounds. How many Rockhopper penguins did Julie see?

Read and Understand

Plan and Solve

Look Back and Check

Ignore Extra Information

18 8-

10Julie saw 10

Rockhopper penguins.

Make an Organized List

Ignore Extra Information

Kayla ate two tacos and an apple for lunch. The tacos had 260 calories. How many calories did Kayla eat for lunch?

Read and Understand

Plan and Solve

Look Back and Check

not enough information

Identify Missing Information

I need to know how many calories the apple had.

June only has quarters and pennies in her coin collection. She has 85 coins in all. How many quarters does June have in her collection?

Read and Understand

Plan and Solve

Look Back and Check

not enough information

Identify Missing Information

I need to know how many pennies June has.

Make an Organized List

Ignore Extra Information

Identify Missing Information

Let’s Practice

!

Decide if each problem has extra information or not enough information. Tell any information that is not needed or that is missing. Solve if you have enough information.

1. There are 328 places for activity photographs in the yearbook. The yearbook club has decided to make most of the photographs black and white. How many color photographs will be in the yearbook?

not enough information

I need to know how many black and white photographs there will be.

Decide if each problem has extra information or not enough information. Tell any information that is not needed or that is missing. Solve if you have enough information.

2. Mrs. Song bought school supplies for her two children, Jason and Kevin. Jason is 2 years older than Kevin. She spent $38 for Kevin’s supplies and $46 for Jason’s supplies. How much money did Mrs. Song spend on school supplies?

extra information

Jason is 2 years older than Kevin.

$38 46+

$84

1

Mrs. Song spent $84.

Decide if each problem has extra information or not enough information. Tell any information that is not needed or that is missing. Solve if you have enough information.

3. A notebook costs $2.68 and a pen costs $1.79. Does Jasmine have enough money to buy a notebook and two pens?

not enough information

I need to know how much money Jasmine has.