- #1
1/2"
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Hi there!
1)It's a very common problem for me .
I don't get when do I have to multiply or divide a fraction in unitary method e.g.
10 men do 1 work in 40 days
10 men does 3/4 work in 40*3/4 days
or should i do 10 men does 3/4 work in 40*4/3 days
I do't undestand!Plz give me a reason why should I multiply or divide it.
I would be very grateful if anybody does so!
2)The problem:
Forty men finish a piece of work in 40 days; if % men leave the work every ten days,in what time will the whole work be completed.
My try:
I tried to put it like this
40 men in 40 days does 1 work
40 men in 1 day does 1/40 work
40 men in 10 day does 1/40 *10work=1/4
But if I do so I becomes a very very long method.
Isn't there any shorter way.
Please help!
Thank you.
1)It's a very common problem for me .
I don't get when do I have to multiply or divide a fraction in unitary method e.g.
10 men do 1 work in 40 days
10 men does 3/4 work in 40*3/4 days
or should i do 10 men does 3/4 work in 40*4/3 days
I do't undestand!Plz give me a reason why should I multiply or divide it.
I would be very grateful if anybody does so!
2)The problem:
Forty men finish a piece of work in 40 days; if % men leave the work every ten days,in what time will the whole work be completed.
My try:
I tried to put it like this
40 men in 40 days does 1 work
40 men in 1 day does 1/40 work
40 men in 10 day does 1/40 *10work=1/4
But if I do so I becomes a very very long method.
Isn't there any shorter way.
Please help!
Thank you.