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test prep please help. thank you

Mathematics
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Apr 13th, 2015

1 : - 

1 + 2/5  *  2/5 + 1/2

2 : - 

= 7/5  *  2/5 + 1/2

= 7/5  *  9/10

= 63 / 50

3 : -

A square consists of a big square inside it whose dimensions are 1*1, a small square whose dimensions are 1/2*2/5, a rectangle whose dimensions are 1*2/5 and another rectangle with dimensions 1*1/2. Find the area of the whole square.

4 : -

The number of squares on vertical side of the grid are 10. And on the horizontal side are also 10.

So the area of whole grid is 

= vertical side * horizontal side

= 10 * 10

= 100 units

This means that the grid is made of hundred unit squares.

5 : - 

Area of diagram from Exercise. 4 is

= 10 * 10

= 100 units

6 : - 

A grid consist of unit squares. Find the area of the grid using the number of unit squares. 

Apr 13th, 2015

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Apr 13th, 2015
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