Logan Avery - Your World: Exploring Aquariums: Subtraction

0covercover.xhtmlcover1page0001page0001.xhtml22page0002page0002.xhtmlYour World Exploring Aquariums Subtraction33page0003page0003.xhtml44page0004page0004.xhtmlTable of Contents Fish Tales 4 Aquarium Animals 8 Come Back Soon 18 Problem Solving 20 Glossary 22 Index 23 Answer Key 2455page0005page0005.xhtmlFish Tales Who lives at aquariums? Fish live there. Other sea animals live there, too. Stingrays are a type of fish at aquariums.66page0006page0006.xhtml77page0007page0007.xhtmlThe animals have all they need. They have clean water. They have good food. They have company, too. Two boys watch the fish swim by.88page0008page0008.xhtmlThis large aquarium holds many types of sea animals.99page0009page0009.xhtmlAquarium Animals This tank has clown fish. The clown fish live in another sea creature. It is called an anemone.1010page0010page0010.xhtmlLet's Do Math! Clown fish live near coral reefs. There were 9 clown fish near the reef. Then, 2 clown fish swam away. How many clown fish are near the reef now? Use the pictures to solve.1111page0011page0011.xhtmlweedy sea dragon1212page0012page0012.xhtmlThese tanks have sea dragons. They look like floating plants. A predator(PREH-duh-tehr) may think they are plants, not food. leafy sea dragon1313page0013page0013.xhtmlPenguins are at aquariums. They need a big space. They need water and land. This penguin dives into the water.1414page0014page0014.xhtmlLet's Do Math! There were 17 penguins on land. Some dove into the water. Then there were 8 penguins on land. How many penguins dove into the water? Draw pictures or place cubes on a part-part-whole model to solve. Write an equation to show your thinking. Whole Part Part These penguins gather on the rocky land.1515page0015page0015.xhtmlSea otters also use the water and land. They stay close to each other. Otters hold each other's paws as they float.1616page0016page0016.xhtmlThis sea otter rests on the rocks.1717page0017page0017.xhtmlJellyfish seem to float on air. But they are in the water. They look like dancers.1818page0018page0018.xhtmlLet's Do Math! Jellyfish can be different colors. There are 8 blue jellyfish. There are 12 pink jellyfish. How many more jellyfish are pink than blue? Use the bar model to solve the problem. blue jellyfish 8 pink jellyfish 121919page0019page0019.xhtmlCome Back Soon! Animals at aquariums are fun to see. Maybe they like to look at you, too! Aquariums teach us about many kinds of sea animals.2020page0020page0020.xhtml2121page0021page0021.xhtmlProblem Solving Amadi visits an aquarium. First, he sees 15 clown fish. Then, he sees other sea animals. Use the clues to find out how many of each animal he sees. Use pictures, words, or numbers to explain your answers in the sentence frames. Then, answer the question. 1. Amadi sees _______ jellyfish because _______. 2. Amadi sees _______ sea dragons because _______. 3. How many more jellyfish does Amadi see than sea dragons?2222page0022page0022.xhtml Clues Amadi sees 9 fewer jellyfish than clown fish. Amadi sees 4 fewer sea dragons than jellyfish.2323page0023page0023.xhtmlGlossary anemone a sea animal that looks like a flower and lives on coral reefs aquariums places people can visit to learn about water plants and animals company another person or animal that someone or something gets together with for friendship or safety coral reefs long lines of coral in shallow water floating gently moving in or on the water predator an animal that hunts other animals for food tank a container for holding water2424page0024page0024.xhtmlIndex clown fish, jellyfish, land, penguin, sea dragon, sea otter, water,2525page0025page0025.xhtmlAnswer Key Lets Do Math! page 9 : 7 clown fish page 13 : 9 penguins; 17 8 = 9 page 17 : 4 more jellyfish are pink than blue Problem Solving 1. 6; explanations will vary 2. 2; explanations will vary 3. 4 more jellyfish than sea dragons2626page0026page0026.xhtmlMath Talk 1. Does 7 2 = 2 7? Why or why not? 2. When can counting back help you subtract? When is counting back not helpful? 3. Which subtraction problems can you solve if you know the total of 6 + 3? 4. There are 12 fish in a tank. A scientist moves some fish into another tank. What information do you need to find out how many fish are left in the tank?2727page0027page0027.xhtmlYour World Exploring Aquariums Subtraction Visiting aquariums is fun. There are many fish, birds, and other creatures to see. Dive into subtraction as you explore the animals at the aquarium.28

Your

World

Exploring

Aquariums

Subtraction

Table

of

Contents

Fish

Tales

Aquarium

Animals

Come

Back

Soon

Problem

Solving

Glossary

Index

Answer

Key

Fish

Tales

Who

lives

at

aquariums

?

Fish

live

there

.

Other

sea

animals

live

there

,

too

.

Stingrays

are

a

type

of

fish

at

aquariums

.

aquariums

The

animals

have

all

they

need

.

They

have

clean

water

.

They

have

good

food

.

They

have

company

,

too

.

Two

boys

watch

the

fish

swim

by

.

company