0covercover.xhtmlcover1page0001page0001.xhtml22page0002page0002.xhtmlEngineering Marvels Toys Partitioning Shapes33page0003page0003.xhtml44page0004page0004.xhtmlTable of Contents Circle Town Toy Shop 4 Toys 6 Circles 16 Problem Solving 20 Glossary 22 Index 23 Answer Key 2455page0005page0005.xhtmlCircle Town Toy Shop Mr. Tan likes toys. He also likes circles! He opened Circle Town Toy Shop.66page0006page0006.xhtml77page0007page0007.xhtmlToys! Circle Town sells toys that are shaped like circles. Yo-yos are a hit at Circle Town. Tops are, too.88page0008page0008.xhtmlLet's Do Math! Mr. Tan also sells board games that come with spinners. The spinners are circles like these. 1. Which spinner shows halves? 2. Which spinner shows fourths? 3. How are spinners C and D alike and different?99page0009page0009.xhtmlHoops are also popular. They must be shaped like circles to twirl. Some shoppers roll them.1010page0010page0010.xhtml1111page0011page0011.xhtml1212page0012page0012.xhtmlThere is a whole row of drums at Circle Town. They come in all sizes. They make a lot of noise!1313page0013page0013.xhtmlMr. Tan loves toy dishes. He likes pots and pans, too. There are so many circles!1414page0014page0014.xhtml1515page0015page0015.xhtmlBikes are one of the best-selling toys at Circle Town. Bikes have two tires shaped like circles. Tricycles have three.1616page0016page0016.xhtmlLet's Do Math! Bike tires have spokes. Spokes divide the space inside tires into equal parts. Draw a tire like this one. Draw spokes so that the space inside the tire is divided into quarters.1717page0017page0017.xhtmlCircles! Mr. Tan keeps flying discs on shelves. Shoppers like to play with them in the store.1818page0018page0018.xhtml1919page0019page0019.xhtml2020page0020page0020.xhtmlSometimes, the circles are hard to spot. But they are always there. Mr. Tan makes sure of it!2121page0021page0021.xhtmlProblem Solving Erica bought a toy oven from Circle Town. She loves to bake! She bakes two cakes shaped like circles. The cakes are the same size. Draw two circles to solve the problems. 1. Show how Erica can cut the first cake into halves. 2. Show how Erica can cut the other cake into quarters. 3. What happens to the size of the parts when there are more equal parts in the same-sized whole?2222page0022page0022.xhtml2323page0023page0023.xhtmlGlossary circles closed, round shapes hit success popular liked by many people spot see twirl spin quickly2424page0024page0024.xhtmlIndex bikes dishes drums flying discs hoops spinners tops tricycles yo yos2525page0025page0025.xhtmlAnswer Key Let's Do Math! page 7 : 1. B 2. C 3. Both spinners have 4 parts. Spinner C has 4 equal parts and spinner D does not. page 15 : Example : Problem Solving 1. Example : 2. Example : 3. More equal-sized parts in a whole means the parts must be smaller.2626page0026page0026.xhtmlMath Talk 1. What math words can you use to describe equal parts? 2. How can you check to be sure a circle is divided into equal parts? 3. What toys are shaped like circles? 4. Maya says that all circles divided into two parts show halves. Do you agree? Why or why not?2727page0027page0027.xhtmlEngineering Marvels Toys Partitioning Shapes Mr. Tan loves toys. He loves circles, too! He opened Circle Town Toy Shop. Go shopping for wholes, halves, and fourths in the new toy store.28
Table of Contents
.
.
.
He
opened
Circle
Town
Toy
Shop
.
circles
.
Circle
Town
sells
toys
that
are
shaped
like
circles
.
Yo-yos
are
a
hit
at
Circle
Town
.
hit
.
Mr.
Tan
also
sells
board
games
that
come
with
spinners
.
The
spinners
are
circles
like
these
.
.
Which
spinner
shows
fourths
?
.
How
are
spinners
C
and
D
alike
and
different
?
.
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