计算:9/10+2/3-7/10

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计算:9/10+2/3-7/10计算:9/10+2/3-7/10计算:9/10+2/3-7/10=9/10-7/10+2/3=2/10+2/3=1/5+2/3=3/15+10/15=13/159/10

计算:9/10+2/3-7/10
计算:9/10+2/3-7/10

计算:9/10+2/3-7/10
=9/10-7/10+2/3
=2/10+2/3
=1/5+2/3
=3/15+10/15
=13/15

9/10+2/3-7/10 =27/30+20/30-21/30=26/30=13/15

9/10+2/3-7/10
=(9-7)/10+2/3
=1/5+2/3
=(3+10)/15
=13/15

3/5