Question

Sue needs 1 1/4 cups of flour for a batch of cookies. How many batches can she make with 9 cups of flour?

Answer 1

start with a simpler problem - suppose Sue needed 2 cups of flour for a batch of cookies. then how many batches could she make with 9 cups of flour?

Answer 2

um 8?

Answer 3

how did you get that?

Answer 4

9/2

Answer 5

then added 4

Answer 6

why did you add 4 at the end?

Answer 7

because of the 4 in 1 1/4

Answer 8

9/2 = 4 and a half is how many batches Sue could make

Answer 9

if each batch took 2 cups

Answer 10

2x4=8

Answer 11

you cant do 2x5 because it would = 10

Answer 12

if 1 batch of cookies takes 2 cups of flours, then how many batches of cookies could be made with 4 cups of flour?

Answer 13

2

Answer 14

correct. so can you see that if it takes 2 cups of flour to make a batch of cookies, then 9 cups of flour woud make 9/2 batches - i.e. 4 and half batches

Answer 15

yes

Answer 16

good.
so now if we go back to your question - it states that Sue needs 1 1/4 cups to make a batch.
therefore, if she has 9 cups of flour, then how many batches can she make?

you answer this by dividing 9 by 1 1/4

just like we divided 9 by 2 in the simpler problem

Answer 17

do you know how to divide by a mixed fraction number like 1 1/4?

Answer 18

yes

Answer 19

7 1/5

Answer 20

so what do you get when you divide 9 by 1 1/4?

Answer 21

7 1/5

Answer 22

perfect! well done! :)

Answer 23

but thats not an option

Answer 24

-_- this is so hard

Answer 25

if they just want how many WHOLE batches can be made, then the answer would be 7

Answer 26

ok thanks :)

Answer 27

yw :)