Brandon has a male puppy with a mass of 3 1/2 kilograms and a female puppy with a mass of 2 1/5 kilograms. How much greater is the male puppy’s mass than the female puppy’s?

3 answers

3 ½=2 ⅕+x

x=3 ½-2 ⅕

x=[3-2]+[5/10-2/10]

x=_____
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