3/5-(-5)÷(-2 1/2)+0.8×2 5/8
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(-0.5)
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3/5-(-5) / (-21/2)+0.8*25/8
(3/5+5)*(-2/21)+(8/10*25/8)
[(3+25)/5]*(-2/21)+2.5
[(28/5)*(-2/21)]+2.5
-56/105+25/10
(-112+525)/210
413/210
(3/5+5)*(-2/21)+(8/10*25/8)
[(3+25)/5]*(-2/21)+2.5
[(28/5)*(-2/21)]+2.5
-56/105+25/10
(-112+525)/210
413/210
2 integer 1/2
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