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2
One day, in the city of Mathimatopolous,
a boy named Billy and a girl named Nancy
went to the zoo...
a boy named Billy and a girl named Nancy
went to the zoo...
3
MonkeysBut when they
got there, all
the animals
were GONE!
got there, all
the animals
were GONE!
4
They ran outside to find groups of animals
everywhere! And decided that it was their
job to bring the animals back to the zoo.
everywhere! And decided that it was their
job to bring the animals back to the zoo.
5
6
First, they found a group of nine cows.
"Why don't we use the Associative property
of addition and multiplication to group them
together and take them back?" said Billy.
"Sure!" replied Nancy, "First we should put them
into groups. There! They already are! we should
put them in to two groups to make it easier. Lets
put it like this..." "Because
there are
four on the
left, only two in the middle, and only three on the right."
"Sure, but with the Associative property of addition and
multiplication says we can do it like this too... just
switch the parentheses and grouping pair."4+(2+3)(4+2)+3Yay! The
cows were
brought back
thanks to
the
Associative
property of
addition and
multiplication!
"Why don't we use the Associative property
of addition and multiplication to group them
together and take them back?" said Billy.
"Sure!" replied Nancy, "First we should put them
into groups. There! They already are! we should
put them in to two groups to make it easier. Lets
put it like this..." "Because
there are
four on the
left, only two in the middle, and only three on the right."
"Sure, but with the Associative property of addition and
multiplication says we can do it like this too... just
switch the parentheses and grouping pair."4+(2+3)(4+2)+3Yay! The
cows were
brought back
thanks to
the
Associative
property of
addition and
multiplication!
7
8
Next, they found lots of pink pigs.
"I think we should use the Commutative property
of addition and multiplication to fix this." proposed
Nancy.
"Alright, how many pigs here total, seven
on the left and seven on the right. We could write the
equation like this..."
"Very true Billy, but
we could also write it like this, thanks to the
Commutative property of addition and
multiplication... Because seven times
two is equal to two
times seven."
"Nice job Nancy noticing that the Commutative
property of addition and multiplication means
that the numbers can switch their spots in an
equation!"7x22x7 Yay! The
pigs were
returned
thanks to
the
Commutative
property of
addition and
multiplication!
"I think we should use the Commutative property
of addition and multiplication to fix this." proposed
Nancy.
"Alright, how many pigs here total, seven
on the left and seven on the right. We could write the
equation like this..."
"Very true Billy, but
we could also write it like this, thanks to the
Commutative property of addition and
multiplication... Because seven times
two is equal to two
times seven."
"Nice job Nancy noticing that the Commutative
property of addition and multiplication means
that the numbers can switch their spots in an
equation!"7x22x7 Yay! The
pigs were
returned
thanks to
the
Commutative
property of
addition and
multiplication!
9
10
For this group of animals, Billy and
Nancy got their dad to bring in a large
truck to load animals on and they
couldn't decide how to load them
most efficiently. All the animals are
about the same size.
"Nancy, why don't we use the
transitive, reflective, and symmetric
properties of equality?"
"Okay, we have four horses, four
zebras, and four camels. If 'a'
represents horses, we can write an
equation that looks like this in the
transitive property of equality
meaning the horses are the same
size... "a=a"Nice job Nancy!" replied
Billy, "We could also put it
like this if 'b' represents
zebras..."
"You could
also put the equation like
this..."
"If 'c' represents camels."
"Very nice Billy! But they
are all the same size, so it
doesn't really matter how
we get them on the truck...
Because if..."
"Then..."
"And..."
a=bc=cb=bc=ab=c
Nancy got their dad to bring in a large
truck to load animals on and they
couldn't decide how to load them
most efficiently. All the animals are
about the same size.
"Nancy, why don't we use the
transitive, reflective, and symmetric
properties of equality?"
"Okay, we have four horses, four
zebras, and four camels. If 'a'
represents horses, we can write an
equation that looks like this in the
transitive property of equality
meaning the horses are the same
size... "a=a"Nice job Nancy!" replied
Billy, "We could also put it
like this if 'b' represents
zebras..."
"You could
also put the equation like
this..."
"If 'c' represents camels."
"Very nice Billy! But they
are all the same size, so it
doesn't really matter how
we get them on the truck...
Because if..."
"Then..."
"And..."
a=bc=cb=bc=ab=c
11
Yay! The Horses, Zebras, and Camels
were brought back to the zoo! Thanks to
the transitive, reflective, and symmetric
properties of equality!
were brought back to the zoo! Thanks to
the transitive, reflective, and symmetric
properties of equality!
12
Nancy and Billy were about to give up
when they saw...
when they saw...
13
14
Seven penguins! They were
so happy!
"Lets get them back before
none of them get hurt."
suggested Nancy,
"Sure but can i tell you a fun
fact before we do?"
"Sure!"
"The additive identity says
that if you add zero plus a
number, the number stays the
same. Take the seven penguins
for example, the equation would
be..." "to equal seven again!"7+0 Yay! The
penguins were
returned to the
zoo! Thanks
to the additive
identity!
so happy!
"Lets get them back before
none of them get hurt."
suggested Nancy,
"Sure but can i tell you a fun
fact before we do?"
"Sure!"
"The additive identity says
that if you add zero plus a
number, the number stays the
same. Take the seven penguins
for example, the equation would
be..." "to equal seven again!"7+0 Yay! The
penguins were
returned to the
zoo! Thanks
to the additive
identity!
15
16
When Nancy saw the sheep
and mountain goats, she came
up with a fun fact for Billy.
"Billy, did you know that the
property of opposites says
that if you add any number
and its opposite, it will equal
zero? Take these animals, the
sheep can be positive and the
goats can be negative..."
"This would
be the problem
then..."-6+6=0Yay! The animals
were returned!
Thanks to the
Property of
Opposites!
and mountain goats, she came
up with a fun fact for Billy.
"Billy, did you know that the
property of opposites says
that if you add any number
and its opposite, it will equal
zero? Take these animals, the
sheep can be positive and the
goats can be negative..."
"This would
be the problem
then..."-6+6=0Yay! The animals
were returned!
Thanks to the
Property of
Opposites!
17
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18
This book was created and published on StoryJumper™
©2010 StoryJumper, Inc. All rights reserved.
Publish your own children's book:
www.storyjumper.com
2
One day, in the city of Mathimatopolous,
a boy named Billy and a girl named Nancy
went to the zoo...
a boy named Billy and a girl named Nancy
went to the zoo...
3
MonkeysBut when they
got there, all
the animals
were GONE!
got there, all
the animals
were GONE!
4
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"Math Zoo Rescue"
Billy and Nancy use math properties to bring animals back to the zoo. They group cows, switch pigs, load horses, zebras, camels, add penguins, subtract ducks, distribute tigers, multiply donkeys, reciprocate moose, divide cats.
(28 pages)
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