Question

solve 21÷ 3 (10 - 3) - 20 + 1 = ?

Answer 1

solve 21\(\div\) 3 (10 - 3) - 20 + 1 = ?

Answer 2

@Kainui

Answer 3

i smell a trickedy-trick

Answer 4

Not a trick @lgbasallote just trying to clear all MISCONCEPTIONS

Answer 5

comeon try it

Answer 6

i like working from left to right so i will
\[21 \div 3(10 - 3) - 20 + 1\]
\[\implies 7(10-3) - 20 + 1\]
\[\implies 7(7) - 20 +1\]
\[\implies 49 - 20 + 1\]
\[\implies 29 + 1\]
\[\implies 30\]

Answer 7

Gud and thats what I did in the previous question

Answer 8

And now tell me why didn't u take it as

\[\large \cfrac{21}{3(10-3)}\]

Answer 9

@lgbasallote

Answer 10

\[\frac{21}{3(10-3)} \implies 21 \div \left[3(10-3)\right]\]
that would be the proper way to write it

Answer 11

so in other words u used VBODMAS rule ......... right ?

Answer 12

it's actually the left to right rule...

Answer 13

you should always operate from left to right

Answer 14

really ???????

now stick to ur rule.. ok

Answer 15

what is

\[\large \cfrac{(4+4+4)\div 4}{6+6+6\div 6}\]

Answer 16

but you should follow PEMDAS always

Answer 17

or whatever acronym you want

Answer 18

\[\implies \frac{ 12 \div 4}{6+6 + 1} \implies \frac{3}{13}\]

Answer 19

done ....

Answer 20

where has ur left to right rule gone now ?

Answer 21

i operated the numerator from left to right

Answer 22

then operate the denominator left to right

Answer 23

then divide

Answer 24

satisfied yet @vishweshshrimali5 ?

Answer 25

really @lgbasallote
if u would have went from left to right then first u would have added 6 + 6 + 6 and then would have divided by 6
i.e. u would have got 3 in denominator

Answer 26

what u did is not a left to right rule but the VBODMAS rule

Answer 27

lol didnt you read what i wrote...you still follow PEMDAS or whatever acronym you want

Answer 28

tsk tsk. read read.

Answer 29

now what is tsk

Answer 30

PEMDAS or whatever acronym becomes unreliable in the problem you wrore unless you go from left to right.

Answer 31

that's the additional rule (probably not taught to a lot of students)

Answer 32

tsk tsk is a sound of disappointment

Answer 33

ohh

Answer 34

well leave everything
I just want to say is that we should stay fixed to predecided rules

Answer 35

i did stick to the :"predecided rules" you dont listen well do you =))

Answer 36

Check out this.......

ohh so left to right is a predecided rule ......... don't say yes !!!

Answer 37

the left to right rule is a rule in PEMDAS or whatever acronym

Answer 38

see how that pdf solves from left to right

Answer 39

\[21 \div 3(10-3) - 20 + 1\]
if you dont solve from left to right you end up with \[21 \div 21 - 20 + 1\]

Answer 40

got the point of the left to right rule im talking about?

Answer 41

im not saying it is a rule like PEMDAS..the left to right rule is an ADDITIONAL rule

Answer 42

\[\frac{ 21 }{ 3 }(10 - 3) - 20 + 1\] or\[\frac{ 21 }{ 3(10 - 3) } - 20 + 1\]What is the right equation? I believe the bottom one is correct because the 3 is distributed to the numbers, not (1/3). However, if the original equation was:

21÷ 3 * (10 - 3) -20 + 1

Then it would be the top one since the 3 is no longer a part of the parentheses. When a number is next to another number like that, it kind of shows it was factored out. Let's replace the (10-3) with an x and disregard the rest.

21÷3x

Now does that become \[\frac{ 21 }{ 7x }\] or\[3x\]

Hint: it's definitely not 3x. I've done enough algebra in my life to know this.

Answer 43

I am sorry to tell you know that you still not have done enough algebra to know this.

Your answer is WRONG.

Answer 44

@Kainui

Answer 45

ok wait

Answer 46

@lgbasallote correct

Answer 47

solve 21÷ 3 (10 - 3) - 20 + 1 = ?
\[\large{21 \div 3*7-20+1=1-20+1=-18}\]

Answer 48

And same is with u @mathslover

Answer 49

VBODMAS

here BODMAS is applied..

B ---> brackets
O ---> of
D ----> div
M ----> multiplication
A-----> addition
S-----> subtraction

Answer 50

I can't believe that you don't know anything about VBODMAS rule

Answer 51

Really @mathslover

Answer 52

I think you have forgotten how to apply the rules @mathslover

Answer 53

u were supposed to divide first ........ i.e. \[21\large {\div}3\]

Answer 54

no ...

brackets first @vishweshshrimali5

Answer 55

solving brackets first then dividing is right

Answer 56

I am talking about \(21 \div 3\) part only

Answer 57

ok

so

Answer 58

you mean to say that:
\[\large{\frac{21}{3} *(10-3) -20+1}\] ?

Answer 59

Lol I mean this whole thing is completely ridiculous. In actual practice no one ever writes things as ambiguous as that. It just doesn't happen. It's either in one of the two forms I wrote, I never see the ÷ sign when someone means that it's a fraction.