What is the value of the expression? -0.75-(-2/5)+0.4+(-3/4)

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asked Apr 24, 2019 168k views

5 votes

What is the value of the expression? -0.75-(-2/5)+0.4+(-3/4)

Mathematics
middle-school

Xeno Lupus asked

by Xeno Lupus

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1 Answer

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$-0.75-\left(-(2)/(5)\right)+0.4+\left(-(3)/(4)\right)=-0.75+(2)/(5)+0.4-(3)/(4)\\\\=-0.75+(2\cdot2)/(5\cdot2)+0.4-(3\cdot25)/(4\cdot25)=-0.75+(4)/(10)+0.4-(75)/(100)\\\\=-0.75+0.4+0.4-0.75=-(0.75+0.75)+(0.4+0.4)\\\\=-1.5+0.8=-0.7$

Xavier Bs answered Apr 29, 2019

by Xavier Bs

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