a.( 2/4 + 5/2 ) + 3/5 = b.2 1/9 + 4 2/9 + 3 5/9 = c. 2 2/3 + 3 3/5 +2 4/3 + 3 2/5 = d.6 3/12 - 3/4 -2/6 = e.8 7/9 - 3/4 - 3 2/6 = f.10 6/4 - 2 5/8 - 2/4 =

A.( 2/4 + 5/2 ) + 3/5 =

<=> (2/4 + 10/4 ) + 3/5
<=> 12/4 + 3/5
<=> 3 + 3/5
<=> 3 3/5

b.2 1/9 + 4 2/9 + 3 5/9 =

<=> ( 2 + 4 + 3 ) + ( 1/9 + 2/9 + 3/9 )
<=> 9 + ( 6/9 )
<=> 9 2/3


c. 2 2/3 + 3 3/5 +2 4/3 + 3 2/5 =

<=> ( 2 + 3 + 2 + 3 ) + ( 2/3 + 3/5 + 4/3 + 2/5 )
<=> 10 + ( 10/15 + 9/15 + 20/15 + 6/15 )
<=> 9 + ( 45/15 )
<=> 9 + 3
<=> 12


d.6 3/12 - 3/4 -2/6 =

<=> 75/12 - 9/12 - 4/12
<=> 62/12
<=> 5 2/12
<=> 5 1/6


e.8 7/9 - 3/4 - 3 2/6 =

<=> 79/9 - 3/4 - 20/6
<=> 316/36 - 27/36 - 120/36
<=> 169/36
<=> 4 25/36

f.10 6/4 - 2 5/8 - 2/4 =

<=> 46/4 - 21/8 - 2/4
<=> 92/8 - 21/8 - 4/8
<=> 67/8
<=> 8 3/8

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