Question

Joe chops a 12 foot long log into 3/4 pieces. How many sections of firewood does he end up with?

Answer 1

@ghazi

Answer 2

@agent0smith

Answer 3

Uh, is it 3/4 foot pieces? 3/4 inch? Can't answer it without knowing that.

Answer 4

I did 12/3/4 on wrb20calc and got 1

Answer 5

oh 3/4 foot

Answer 6

So you're going at it the right way, 12/(3/4) but you've made a mistake.\[\frac{ 12 }{ \frac{ 3 }{ 4} }=12 \times \frac{ 4 }{ 3 }\]

Answer 7

When you divide by a fraction, you can multiply by the reciprocal of the fraction.

Answer 8

oh. so. is it 1?

Answer 9

it won't be 1, think about it this way - if you have a 12 foot long piece of wood, and you cut it into 1 foot long pieces, how many pieces would you have? 12/1 right? So 12. And 3/4 foot is smaller than 1 foot, so there will be more than 12 pieces.

Answer 10

.oh.

Answer 11

so how would u work it out?

Answer 12

\[\frac{ 12 }{ \frac{ 3 }{ 4} }=12 \times \frac{ 4 }{ 3 } =\frac{ 12 \times 4 }{ 3 }\]

Answer 13

so do i calculate that?

Answer 14

yep

Answer 15

mk. brb

Answer 16

16?

Answer 17

Correct. You can do it on a calculator, but the problem is that you forgot the brackets.

"I did 12/3/4 on wrb20calc and got 1"

12/3/4 is NOT the same as 12/(3/4) <---- enter this on a calculator and you'll get the correct answer. Enter 12/3/4 and you'll get 1.

Answer 18

ah. so, 16 ir right,yes?

Answer 19

Yes. You can check it on a calculator, by entering 12/(3/4), just don't forget the brackets.

Answer 20

i did that just now. tnx:)

Answer 21

Or, convert 3/4 to a decimal = 0.75. Then do 12/0.75 = 16.

Answer 22

okay.