10-7/10等于93/1093/10-3/10等于9
题目是10-7/10-3/10=？10-7/10-3/10=10-(7/10+3/10)=10-(7+3)/10=10-1=9
10－（7/10+3/10）=9
10-7/10-3/10=10-(7/10+3/10)=10-1=9
