Judith classified 4 1/5 as an integer. What is her error

An integer is the negative and positive counting number

they are

... - 3,-2,-1,0,1,2,3,4 ...

4 and 1/5 is between numbers

it is a rational number, not an integer

step your game up, judith. math isn't a game

Her error is that fractions are not integers. Only whole positive and negative numbers are integers.