Question

If the product of six tenths and three tenths is subtracted from the sum of two tenths and four tenths, what

is the difference?

Answer 1

21/50

Explanation:

The given expression can be evaluated as follows.

`\left((2)/(10)+(4)/(10)\right)-\left((6)/(10)*(3)/(10)\right)\\\\=(2+4)/(10)-(6*3)/(10*10)=(6)/(10)-(18)/(100)\\\\=(30)/(50)-(9)/(50)=\boxed{(21)/(50)}`

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Additional comment

We reduced the fraction 18/100 to 9/50 before looking for a common denominator with 6/10. The common denominator turned out to be 50, so the 6/10 fraction became (6/10)(5/5) = 30/50.