Question

1/2 - 3/10 please help

Answer 1

`\huge\boxed{(1)/(5)=0.2}`

Explanation:

`(1)/(2)-(3)/(10)=(1\cdot5)/(2\cdot5)-(3)/(10)=(5)/(10)-(3)/(10)=(5-3)/(10)=(2)/(10)=(2:2)/(10:2)=(1)/(5)\\\\\\(1)/(2)=0.5;\ (3)/(10)=0.3\\\\(1)/(2)-(3)/(10)=0.5-0.3=0.2`