We’re Going to the We’re Going to the Store!Store!

By: Maranda WhiteBy: Maranda White

Mom sent us to the store to get groceries.Mom sent us to the store to get groceries.

She gave us $20 and a list of things to buy.She gave us $20 and a list of things to buy.

The first thing on the list is bread The first thing on the list is bread

We go to the bread aisle. We go to the bread aisle.

The bread costs $1.75.The bread costs $1.75.

If mom asks for 2 loaves, how much will we spend If mom asks for 2 loaves, how much will we spend on bread?on bread?

We know that saying one loaf and one loaf We know that saying one loaf and one loaf together makes two loaves.together makes two loaves.

Therefore the cost of one loaf, plus the cost Therefore the cost of one loaf, plus the cost of one loaf equals the cost of two loaves.of one loaf equals the cost of two loaves.

+ =+ =

One Loaf + One Loaf = Two LoavesOne Loaf + One Loaf = Two Loaves

$1.75 + $1.75 = Cost of Two Loaves$1.75 + $1.75 = Cost of Two Loaves

Let’s see if we can find another way to figure Let’s see if we can find another way to figure out how much they will cost…out how much they will cost…

We know that multiplying one loaf by the We know that multiplying one loaf by the amount needed, two, makes two loaves. amount needed, two, makes two loaves.

Therefore, the cost of one loaf, multiplied Therefore, the cost of one loaf, multiplied by the amount needed, two, equals the by the amount needed, two, equals the

cost of two loaves.cost of two loaves.

X 2 = X 2 =

One Loaf x Two = Two LoavesOne Loaf x Two = Two Loaves$1.75 x 2 = Cost of Two Loaves$1.75 x 2 = Cost of Two Loaves

One loaf = One loaf = $1.75 $1.75

One loaf = One loaf = + +$1.75$1.75

Two loaves=Two loaves= $3.50 $3.50

One loaf=One loaf= $1.75 $1.75

Multiplied by two= Multiplied by two= x 2x 2

$3.50$3.50

We already spent $3.50. If we started We already spent $3.50. If we started with $20.00, how much money do we with $20.00, how much money do we have left to buy the rest of our have left to buy the rest of our groceries?groceries?

If we had $20.00 to begin with, and we If we had $20.00 to begin with, and we spent $3.50, how do we figure out how spent $3.50, how do we figure out how

much money we have left to spend?much money we have left to spend?

a)a) $20.00-$3.50$20.00-$3.50

b)b) $20.00/$3.50$20.00/$3.50

c)c) $20.00x$3.50$20.00x$3.50

d)d) $20.00+$3.50$20.00+$3.50

If you said $20.00-$3.50, you are correct! If you said $20.00-$3.50, you are correct! We had $20.00 and we spent $3.50. We no We had $20.00 and we spent $3.50. We no longer have that $3.50, so we take it away longer have that $3.50, so we take it away from our total amount of leftover money!from our total amount of leftover money!

Total money:Total money: $20.00 $20.00

Money spent: Money spent: -$3.50-$3.50

Leftover money: $16.50Leftover money: $16.50

We have $16.50 left to spend. Let’s move on We have $16.50 left to spend. Let’s move on to the rest of the list.to the rest of the list.

The next item on the list is milk. The next item on the list is milk.

One quart of milk costs $1.05. One quart of milk costs $1.05.

Mom needs three quarts, how much will be Mom needs three quarts, how much will be spend on milk?spend on milk?

Adding one quart, one quart, and one quart Adding one quart, one quart, and one quart makes three quarts.makes three quarts.

Therefore the cost of one quart, plus the cost Therefore the cost of one quart, plus the cost of another quart, plus the cost of another of another quart, plus the cost of another

quart equals the cost of three quarts.quart equals the cost of three quarts.

One Quart + One Quart + One Quart= Three One Quart + One Quart + One Quart= Three QuartsQuarts

$1.05 + $1.05 + $1.05 = Cost of Three $1.05 + $1.05 + $1.05 = Cost of Three QuartsQuarts

We also know that multiplying one quart by We also know that multiplying one quart by the amount needed, three, makes three the amount needed, three, makes three

quarts. quarts.

Therefore, the cost of one quart multiplied Therefore, the cost of one quart multiplied by the amount needed, three, equals the by the amount needed, three, equals the

costs of three quarts. costs of three quarts.

X 3 = X 3 =

One Quart x Three = Three QuartsOne Quart x Three = Three Quarts

$1.05 x 3 = Cost of Three Quarts$1.05 x 3 = Cost of Three Quarts

One quart:One quart: $1.05 $1.05

One quart:One quart: $1.05 $1.05

One quart: One quart: + $1.05+ $1.05

Three quarts:Three quarts: $3.15 $3.15

One quart:One quart: $1.05 $1.05

Multiplied by three: Multiplied by three: x 3x 3

$3.15$3.15

We had $16.50 left over after we We had $16.50 left over after we bought the bread. How much will we bought the bread. How much will we have left over after we buy the milk?have left over after we buy the milk?

Do you remember how to find out how Do you remember how to find out how much money we have left over?much money we have left over?

That’s right! Subtract the total amount of That’s right! Subtract the total amount of money you spent from the amount you money you spent from the amount you had. You then have the total amount of had. You then have the total amount of money leftover!money leftover!

Total Money:Total Money: $16.50$16.50

Bread:Bread: -$3.15-$3.15

Leftover Money:Leftover Money: $13.35$13.35

We have $13.35 left to spend. Let’s move on We have $13.35 left to spend. Let’s move on to the rest of the list.to the rest of the list.

The next item on the list is cheese.The next item on the list is cheese.

One pound of cheese is $4.75. One pound of cheese is $4.75.

If mom says we can spend no more than If mom says we can spend no more than $10.00 on cheese, how many pounds can $10.00 on cheese, how many pounds can we buy?we buy?

If one pound costs $4.75, and we have If one pound costs $4.75, and we have $10.00 to spend, we know we can get $10.00 to spend, we know we can get at least one pound from $10.00.at least one pound from $10.00.

Amount allowed to spend:Amount allowed to spend: $10.00 $10.00

Cost of one pound:Cost of one pound: -$4.75-$4.75

Amount left to spend on cheese:$5.25Amount left to spend on cheese:$5.25

Do we have enough money to buy Do we have enough money to buy another pound of cheese?another pound of cheese?

If you said yes, you are right!If you said yes, you are right!

We bought two pounds of cheese for less We bought two pounds of cheese for less

than $10.00!than $10.00!

$4.75 + $4.75 = $9.50$4.75 + $4.75 = $9.50cost of one pound + cost of one pound = cost of two cost of one pound + cost of one pound = cost of two

poundspounds

We have $13.35 left after buying the bread We have $13.35 left after buying the bread and the milk. How much will we have left and the milk. How much will we have left over after we buy the cheese?over after we buy the cheese?

Total Money:Total Money: $13.35$13.35

Cheese: Cheese: -$9.50-$9.50

Leftover Money:Leftover Money: $3.85 $3.85

We have $3.85 left to spend. Let’s move on We have $3.85 left to spend. Let’s move on to the rest of the list.to the rest of the list.

The last item on the list is bananas. The last item on the list is bananas.

One pound of bananas is $.50.One pound of bananas is $.50.

If I spent $1.50 on bananas, how many If I spent $1.50 on bananas, how many pounds did I buy?pounds did I buy?

If we know one pound costs $.50, how can If we know one pound costs $.50, how can we figure out how pounds we can buy for we figure out how pounds we can buy for

$1.50?$1.50?

a)a) $.50 x $1.50$.50 x $1.50

b)b) $1.50 - $.50$1.50 - $.50

c)c) $1.50 / $.50$1.50 / $.50

d)d) $.50 + $1.50$.50 + $1.50

If you said $1.50 / $.50, you are right!If you said $1.50 / $.50, you are right!

If we spent $1.50 and each pound is $.50, If we spent $1.50 and each pound is $.50, how many pounds did we buy?how many pounds did we buy?

Or, how many groups of $.50 are in $1.50?Or, how many groups of $.50 are in $1.50?

$.50 + $.50 + $.50 = $1.50$.50 + $.50 + $.50 = $1.50

So, three pounds of bananas were bought So, three pounds of bananas were bought with $1.50!with $1.50!

One pound:One pound: .50 .50

One pound:One pound: .50 .50

One pound: One pound: + .50+ .50

Three pounds: $1.50Three pounds: $1.50

One pound:One pound: .50 .50

Multiplied by three:Multiplied by three: x 3x 3

$1.50$1.50

We have $3.85 after buying the We have $3.85 after buying the bread, milk and cheese. How much bread, milk and cheese. How much will we have left over after buying will we have left over after buying the bananas?the bananas?

Remember to subtract from the total Remember to subtract from the total amount!amount!

Total Money:Total Money: $3.85$3.85

Bananas:Bananas: -$1.50-$1.50

Leftover Money:Leftover Money: $2.35$2.35

We have $2.35 left after buying the We have $2.35 left after buying the groceries.groceries.

Maybe we should stop for ice cream!Maybe we should stop for ice cream!

Nope! Let’s just go home! I’m sure mom has Nope! Let’s just go home! I’m sure mom has some left over in the fridge- I’ve had some left over in the fridge- I’ve had enough math practice for today!enough math practice for today!

The End!The End!