Dona Herweck Rice - Travel Adventures: The Great Barrier Reef: Place Value

0covercover.xhtmlcover1page0001page0001.xhtml22page0002page0002.xhtmlTravel Adventures The Great Barrier Reef Place Value33page0003page0003.xhtml44page0004page0004.xhtmlTable of Contents Nature's Playground 4 What Is a Reef 8 Sea Creatures 12 Take Care 18 Problem Solving 20 Glossary 22 Index 23 Answer Key 2455page0005page0005.xhtmlNatures Playground The Great Barrier Reef is big. It is beautiful. It is very old. And it is alive!66page0006page0006.xhtmlGreat Barrier Reef77page0007page0007.xhtmlIt is made of smaller coral reefs. Many sea creatures live there. Some are part of the reef.88page0008page0008.xhtmlLet's Do Math! Imagine you see 16 clown fish at the Great Barrier Reef. Draw or place objects on ten frames to answer the questions. 1. Are there enough clown fish to make a ten? 2. Are there any leftover clown fish after you make a ten? If so, how many?99page0009page0009.xhtmlWhat Is a Reef? A reef is a bar of rock and coral. A reef lies just under the water in the ocean.1010page0010page0010.xhtml1111page0011page0011.xhtmlLiving coral grows on the rock. The rock is made from coral that has died. Live coral is colorful.1212page0012page0012.xhtml1313page0013page0013.xhtmlSea Creatures There is a lot of life in the Great Barrier Reef! Sea creatures of all kinds call it home.1414page0014page0014.xhtmlA green sea turtle and some fish swim near the reef.1515page0015page0015.xhtmlHundreds of types of coral live there. Fish of all colors live there. Dolphins and rays live there, too. coral trout1616page0016page0016.xhtmlLet's Do Math! You are swimming with your brother at the reef. You see 22 blue tangs. Your brother sees 24 blue tangs. Use the phrases greater than and less than to compare the number of fish. 1. 22 is _______ 24 2. 24 is _______ 22 spotted eagle ray1717page0017page0017.xhtmlThe reef is also home to many types of birds. They live on its islands. osprey1818page0018page0018.xhtmlred-tailed tropicbird silver gull-tailed1919page0019page0019.xhtmlTake Care! Many people visit the Great Barrier Reef. They must help take care of it. We want the reef to last!2020page0020page0020.xhtmlLet's Do Math! You snorkel through the Great Barrier Reef. You see 12 blue triggerfish. You see 20 green parrotfish. You see 13 yellow cuttlefish. Use > or < to compare the number of fish. 1. 12 _______ 20 2. 20 _______ 13 3. 13 _______ 122121page0021page0021.xhtmlProblem Solving You are ready to snorkel at the Great Barrier Reef. Down you go! You see 12 rays 21 blue tangs 1. How many groups of ten rays are there? Are there any leftover rays? If so, how many? 2. How many groups of ten blue tangs are there? Are there any leftover blue tangs? If so, how many? 3. Use >, <, or = to compare the number of rays and blue tangs. 12 _______ 212222page0022page0022.xhtml2323page0023page0023.xhtmlGlossary coral reefs hard materials that are formed on the bottom of the sea creatures animals greater more islands areas of land surrounded by water less fewer snorkel to swim underwater with a breathing tube2424page0024page0024.xhtmlIndex birds, coral, dolphins, fish, islands, rays, rock, snorkel,2525page0025page0025.xhtmlAnswer Key Let's Do Math! page 7 : 1. yes 2. yes; 6 leftover clown fish page 15 : 1. less than 2. greater than page 19 : 1. < 2. > 3. > Problem Solving 1. 1 group of ten; yes; 2 leftover rays 2. 2 groups of tens; yes; 1 leftover ray 3. &nbsp: < 2626page0026page0026.xhtmlMath Talk 1 What do the symbols >, <, and = mean? 2 What is a number that will have no leftovers after making tens? 3 How are the numbers 15 and 51 alike? How are they different? 4 Lena says that 23 has 2 tens and 3 ones. Peter says 23 has 1 ten and 13 ones. Who is right? Why do you think so?2727page0027page0027.xhtmlTravel Adventures The Great Barrier Reef Place Value It is big, old, and beautiful. It is also alive! It is the Great Barrier Reef. Many colorful sea creatures live there. Come see the coral and learn about place value. Place Value28

Travel

Adventures

The

Great

Barrier

Reef

Place

Value

Table

of

Contents

Nature's

Playground

What

Is

a

Reef

Sea

Creatures

Take

Care

Problem

Solving

Glossary

Index

Answer

Key

Natures

Playground

The

Great

Barrier

Reef

is

big

.

It

is

beautiful

.

It

is

very

old

.

And

it

is

alive

!

Great

Barrier

Reef

It

is

made

of

smaller

coral

reefs

.

Many

sea

creatures

live

there

.

Some

are

part

of

the

reef

.

coral_reefs

creatures

Let's

Do

Math

!

Imagine

you

see

clown

fish

at

the

Great

Barrier

Reef

.

Draw

or

place