(-0.7)+(-0.4)+1+(-0.3)+0.5

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(-0.7)+(-0.4)+1+(-0.3)+0.5
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(-0.7)+(-0.4)+1+(-0.3)+0.5
(-0.7)+(-0.4)+1+(-0.3)+0.5

(-0.7)+(-0.4)+1+(-0.3)+0.5
(-0.7)+(-0.4)+1+(-0.3)+0.5
=(-0.7-0.3)+1+(-0.4+0.5)
=-1+1+0.1
=0.1

。3

0.1

0.1