Algebra Readiness - Math help, please

[Belle0101]

This is for DS11 in 6th grade.

Okay, here's the problem:

3.7(1.8)= t + 2.9

They, the students, have to show all their work so even if he has the right answer but doesn't show the work, it gets marked wrong. Seems to us that t = 1.8 but we're not 100% sure as to how to show the work for it.

I like DS7 homework better ... 9 + 9 = ?, 5 + 5 = ? ...

Thanks for your help! I may need more help with the upcoming chapter ... it's dividing fractions

 

[horseshowmom]

t= 3.76

3.7 (1.8) = t + 2.9
(3.7 times 1.8 = t + 2.9) (extra step here, doesn't need to be shown)
6.66 = t + 2.9
6.66 - 2.9 = t + 2.9 - 2.9
3.76 = t

 

[EthansMom]

This is for DS11 in 6th grade.

Okay, here's the problem:

3.7(1.8)= t + 2.9

First, I'd restate it:
t + 2.9 = 3.7(1.8)
then do the multiplication:
t + 2.9 = 6.66
then subtract 2.9 from each side
t + 2.9 - 2.9 = 6.66 - 2.9
t = 3.76

Anyone care to check my Math?

For algebra, do any work in parenthesis first, then multiplication and division, then addition and subtraction. If you add or subtract something from one side, you have to add or subtract it from the other side at the same time.

Good Luck!

 

[daisyduck123]

I can't help you , but when DD12 (got an A in Algebra I last year) gets home from swim team practice, she can do it for you if you don't get any other replies.

 

[karynnix]

3.7(1.8)=t+2.9
multiply 3.7 and 1.8

6.66=t+2.9
subtract 2.9 from both sides

t=3.76

 

[Belle0101]

Okay, I'm obviously not going to make it through 6th grade math.

So in this problem ( ) is for multiplication. I like things easy. Why not just write it in the textbook as 3.7 X 1.8? I could understand that.

Thanks for the help, I'm going to print all your replies out so DS can see how to work it out.

 

[L107ANGEL]

Okay, I'm obviously not going to make it through 6th grade math.

So in this problem ( ) is for multiplication. I like things easy. Why not just write it in the textbook as 3.7 X 1.8? I could understand that.

Thanks for the help, I'm going to print all your replies out so DS can see how to work it out.

Yes () means multiply

 

[horseshowmom]

Okay, I'm obviously not going to make it through 6th grade math.

So in this problem ( ) is for multiplication. I like things easy. Why not just write it in the textbook as 3.7 X 1.8? I could understand that.

Thanks for the help, I'm going to print all your replies out so DS can see how to work it out.

The reason they use the parenthesis instead of X for multiplication is because when you do algebra, "x" often represents a variable, and you don't want there to be any confusion (such as, does this mean "times" or does it mean "x" - like it meant "t" in the problem).

Also, you'll sometimes see a raised dot to represent multiplication. DD recently had a teacher in her pharmaceutical calculations class who didn't know that (the teacher is from India and had never seen it before and had started chewing the class out, because some of them sometimes wrote that on their papers ).

Good luck!

 

[ChrizJen]

I LOVE Algebra!!

 

[EthansMom]

Okay, I'm obviously not going to make it through 6th grade math.

So in this problem ( ) is for multiplication. I like things easy. Why not just write it in the textbook as 3.7 X 1.8? I could understand that.

Thanks for the help, I'm going to print all your replies out so DS can see how to work it out.

Yes, ( ) stands for multiplication if there isn't any other notation. Also, a single dot in the middle (like a floating period) also means multiplication. A / is for division.

Parentheses are also used to designate the order in which to do operations, however. In something like this:

7(3+4) - 8/2 = x

you have to do the operations in the parentheses first:

7(7) - 4 = x
x = 45

With parentheses within parentheses, you have to work your way out, doing operations in the most inner parentheses first. So in:

y = {7*[3(6-4)]}
y = {7*[3(2)]}
y = {7*6}
y = 42

Good Luck!

 

[horseshowmom]

Yeah, me too (but as somebody talked about on another thread, I wasn't that fond of Geometry...)!

 

[EeyoreFan1]

This is for DS11 in 6th grade.

Okay, here's the problem:

3.7(1.8)= t + 2.9

They, the students, have to show all their work so even if he has the right answer but doesn't show the work, it gets marked wrong. Seems to us that t = 1.8 but we're not 100% sure as to how to show the work for it.

I like DS7 homework better ... 9 + 9 = ?, 5 + 5 = ? ...

Thanks for your help! I may need more help with the upcoming chapter ... it's dividing fractions

3.7(1.8)=t+29

3.7x1.8=t+29
6.66=t+29
29-6.66=t
t=22.34

I AM HORRIBLE AT ALGEBRA SO I AM PROBABLY WRONG

 

[EeyoreFan1]

Okay, I'm obviously not going to make it through 6th grade math.

So in this problem ( ) is for multiplication. I like things easy. Why not just write it in the textbook as 3.7 X 1.8? I could understand that.

Thanks for the help, I'm going to print all your replies out so DS can see how to work it out.

Umm..it gets WORSE FAR FAR WORSE! This is only the EASY stuff!!!

 

[Cinderella94]

3.7(1.8)=t+29
Start by multiplying what's in the paranthesis:
3.7x1.8=t+29
Simplify the left side of the equation:
6.66=t+29
Subtract 29 from both sides to get "t" by itself:
6.66-29=t
And again, simplify the left side:
-22.34=t

P.S.-I'm daisyduck123's (who posted above) daughter =]