1) -1/8=-0,125
2) 1/3+2/3=3/3=1
3) -9/15+6/9+4/15=-5/15+6/9 |×45
=-5×3+6×6=36-15=21
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1) -1/8=-0,125
2) 1/3+2/3=3/3=1
3) -9/15+6/9+4/15=-5/15+6/9 |×45
=-5×3+6×6=36-15=21