Question

What is 1 1/2 x3

Answer 1

it is
\[\huge 1\tfrac{1}{2}\times 3\]

Answer 2

yes

Answer 3

do you know how to write \[\huge 1\tfrac{1}{2}\] as an "improper fraction"? that is the first step

Answer 4

a little

Answer 5

so first we have do deal with the 1 x 2 portion
so what's 1 x 2 ?

Answer 6

I got 3/2

Answer 7

good

Answer 8

correct.

Answer 9

then
\[\frac{3}{2}\times 3\] completes it

Answer 10

remember "multiply" means multiply in the numerator (top) so
\[\frac{3}{2}\times 3=\frac{3\times 3}{2}\]

Answer 11

\[\LARGE \frac{3}{2} \times 3 \]
now all we have to do is to multiply \[\LARGE \frac{2}{2}\] to 3 so we can have fractions with the same numerator x.x

Answer 12

oh no!!!

Answer 13

i got 6

Answer 14

what?

Answer 15

@UsukiDoll c'mon! you know you do not need a common denominator to multiply fractions !!!

Answer 16

I also got 18

Answer 17

lets go slow

Answer 18

nugh. this guy -_-

Answer 19

sigh.. let me guess change 3/2 into a decimal and then multiply by 3 ?

Answer 20

no no just multiply

Answer 21

we are at this step
\[\frac{3}{2}\times 3\] right?

Answer 22

6

Answer 23

there is no 6 in it

Answer 24

i multiplied and got 6

Answer 25

\[\frac{3}{2}\times 3=\frac{3\times 3}{2}\] where does the 6 come from?

Answer 26

then I multiplied and got 18

Answer 27

wait a sec. re-write this a bit. to what sat wrote

Answer 28

okay

Answer 29

in the numerator (top) you have \(3\times 3\) which is ?

Answer 30

9

Answer 31

right

Answer 32

so the numerator is 9 and the denominator is 2
which is 9/2

Answer 33

and in the denominator you have just the 2

Answer 34

okay

Answer 35

giving you \[\frac{9}{2}\] which you should probably then write as a mixed number since you started
with mixed numbers

Answer 36

4 1/2

Answer 37

at the risk of repeating myself you do NOT find a common denominator when multiplying
that is for addition or subtraction
multiply means multiply, that is all

Answer 38

right

Answer 39

wow are you kidding me right now sat?
\[\large \frac{3}{2} \times 3 \cdot \frac{2}{2}\]
\[\large \frac{3 \times 6}{4} \rightarrow \frac{18}{4} \rightarrow \frac{9}{2}\]

Answer 40

that is \[\huge 4\tfrac{1}{2}\] is correct

Answer 41

@UsukiDoll you must be kidding me right?

Answer 42

okay

Answer 43

no. even with finding the common denominator we can still get the same result -_-

Answer 44

\[\frac{3}{2}\times 3\times\frac{100}{100}=\frac{3\times 300}{200}=4\tfrac{1}{2}\]

Answer 45

heck if I was given that option to do it that way, pfffffffft so be it XD

Answer 46

you are doing nothing but confusing the issue
you can get an equivalent fraction for 3 by multiplying top and bottom by any number you choose, but you do not do that when multiplying

Answer 47

no I'm not. I'm making it easier by having common denominators all over the place, so I can simplify the numerator... combine the denominator and then reduce.

Answer 48

let me repeat myself
you do NOT find a common denominator when multiplying
you need that only for addition and subtraction
multiply means multiply

Answer 49

\[\frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd}\] that is all

Answer 50

ahahaha you just did fractions XD

Answer 51

yes of course

Answer 52

\[\frac{a}{b}\times c=\frac{ac}{b}\] also fractions

Answer 53

\[\frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd} \]
this is better.

Answer 54

they are the same, only in the second case
\[\frac{a}{b}\times c\] you have \(d=1\)
no common denominator needed

Answer 55

okay

Answer 56

exactly sat .. still using fractions XD

Answer 57

let me ask you @UsukiDoll do you really build up fractions when multiplying?
how would you compute
\[\frac{52}{17}\times 5\]?

Answer 58

\[\frac{52}{17}\times 5 \cdot \frac{17}{17}\]
\[\frac{52}{17} \times \frac{85}{17} \rightarrow \frac{4420}{289} \]

Answer 59

at least you are being consistent!

Answer 60

some times people have different methods that still give you the same answer

Answer 61

why not
\[\frac{52}{17}\times 5 \cdot \frac{23}{23}\]? that will work as well

Answer 62

@UsukiDoll is it right?\(3=\dfrac{3}{1}\)? why do we have the common denominator on multiplication ?

Answer 63

so agree with @Aliypop

Answer 64

i like \[\frac{52}{17}\times 5 \cdot \frac{1712}{1712}\]

Answer 65

so the answer is 52/17

Answer 66

\[\frac{52}{17}\times 5=\frac{52\times 5}{17}\]

Answer 67

so your real job is to compute \(52\times 5\)
don't mess with mr 17

Answer 68

don't mess with mister inbetween?

Answer 69

so would I multiply

Answer 70

that's just some example fraction that they threw at me. the real answer is already done.
Honestly that's what I was taught in elementary school and it worked well. NO one is going to force me to use whatever kind of jumbo shrimp thing they throw out there. If it worked millions of times, I'm not going to change it!

Answer 71

P.S
\[ \frac{4420}{289} = 15.29\]
\[\frac{52}{17}\times 5 = 3.058 \times 5 = 15.29\]

oh look ! The same decimal value regardless of method. nughhhhhh. . . sorry for ranting but that had gone too far.

Answer 72

thank for so much for helping me @UsukiDoll

Answer 73

you're welcome @Aliypop :)
It's after 4 am... I better get some sleep.

Answer 74

okay

Answer 75

night everyone.