Can you please help me solve this problem? I tried multiplication, tu then I read the question and realized that I had no idea how to solve it. ☹️
5 Answers
3 pounds, 2 pounds, 0.60 pounds
Explanation:
This can be solved using division.
The problem can be restated as: For a given amount of money how much candies can you buy.
For (a)
We have 2 "$3.50" in "$7" and we know that for every $3.50 we have, we can buy 1 pound of candies.
Therefore, for $7, we can buy 2 pounds of candies.
The same can be done for (b) and (c)
For (b)
For (c)
See a solution process below:
Explanation:
We can solve this using ratios:
**So, to find how much candy we can buy for $7 we can solve:#
#x = 2"lb"
Therefore you can buy 2 pounds of candy for $7.00
**To find how much candy we can buy for $10.50 we can solve:#
#x = 3"lb"
Therefore you can buy 3 pounds of candy for $10.50
**To find how much candy we can buy for $2.10 we can solve:#
Therefore you can buy 0.6 or
You use division.
Explanation:
For
For
For
Explanation:
The weight to cost ratio stays the same;
so
a. The number of pounds bought for
after multiplying both sides by
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Similarly
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and
Slightly different presentation of the solution. First part is using first principles. It shows where the shortcut method of cross multiply comes from.
Explanation:
We are given the initial condition:
Dropping the units of measurement
Let the unknown value be
To find the value of
So we can do this:
Also, if you multiply by 1 you do not change the value
but we can write 1 as
which is where your shortcut of cross multiply comes from.
Comparing just the tops of the ratios (numerators) we have
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Given
Cross multiply
Did you know that you can cancel out units of measurement the way I have?
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Given