Arithmetic Grade Four

Lesson One hundred and nineteen: Mixed to Decimals

As we saw in the last lesson, adding to mixed numbers is sometimes easier if you convert them to decimals first. Consider the following examples: 


       1  2/25 + 2  1/20  =  1.08 + 2.05  = 3.13

       2  3/20 + 1  1/4   =  2.15 + 1.25  = 3.40
If you really wanted to you could find equivalent fractions and then convert your fraction answer to a decimal like this: 

       1  2/25 + 2  1/20  =  1  8/100  +  2  5/100  =  3  13/100  = 3.13

       2  3/20 + 1  1/4   =  2  15/100  + 1   25/100  =  3  40/100  =  3.40
This requires an extra step, but it still gets you the same answer.

Now you get to try a few for yourself.

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