4 of the original boards have a summed length of 20 units. 5 x 4 = 20.
Since 2/5 is left from each board, you simply add them until the 2's add to 20.
So, 2 x 10 = 20. Hence, there are 10 2/5 boards.
That's just 4 of the boards that the 2/5 make up, but that should also mean that there are 10 3/5 boards as well.
30/5 + 20/5 = 50/5
Reduction = 10
The carpenter started with 10 5/5 boards.
:D
Answer:
the first one of them is right
Mrs.smith divided one square mile of land to her 3 children,amy,brianna ,and chad.
1 mile is divided among each children . so the fraction of land each one get is 
Amy's land =
Brianna's land =
Chad's land =
Amy decided to divide her portion of the land equally between her 2 children.
We know Amys land = 1/3
1/3 is divided among two children so we divide the fraction by 2
= 
= 
fraction of mrs. smith's land one of amy's children own.
Chad divided his land equally among his 6 children
We know Amys land = 1/3
1/3 is divided among 6 children so we divide the fraction by 6
= 
= 
fraction of mrs. smith's land one of Chad's children own.
Let us start with something we know is true.
5 > 3
That reads as 5 is greater than 3. Anyone will tell you that that is a true statement.
But what happens when you multiply this result by - 10
5 * -10 > 3 * - 10
- 50 > - 30 is that true? If you are not sure, think it terms of money. Which would you rather be
owing 50 dollars to some or owing 30 dollars to someone? Of course if you are careful with money you would likely say neither. But this is math so you have to choose.
You likely would have to say you would want to owe 30 dollars. That makes - 30 larger than - 50. So a true statement has now become a false one. Check with me if you don't understand. I'd like to know if you accept my explanation.
