(negative 11 and 2 / 3) - (negative 7 and 2 / 5) - 12 and 1 / 3 - (- 4.2) =?

(negative 11 and 2 / 3) - (negative 7 and 2 / 5) - 12 and 1 / 3 - (- 4.2) =?

(negative 11 and 2 / 3) - (negative 7 and 2 / 5) - 12 and 1 / 3 - (- 4.2)
=-11-2/3+7+2/5-12-1/3+4.2
=-11+7-12+4-2/3-1/3+2/5+0.2
=-12-1+0.6
=-12.4;
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Minus one third plus two fifths
-(1/3)+2/5

-(1/3)+2/5
=-(5/15）+6/15
=1/15

Minus one third minus two fifths plus minus two thirds plus three fifths

-1/3-(-2/5)+(-2/3)+3/5
=-1/3+(-2/3)+(-2/5+3/5)
=-1+(-2/5+3/5)
=-1+1/5
=-4/5