来自储炬的问题
【计算9999×7778+3333×66661/20+1/30+1/42+1/5】
计算9999×7778+3333×66661/20+1/30+1/42+1/5
1回答
2020-06-24 23:31
【计算9999×7778+3333×66661/20+1/30+1/42+1/5】
计算9999×7778+3333×66661/20+1/30+1/42+1/5
9999×7778+3333×6666
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000
1/20+1/30+1/42+1/56+1/72+1/90
=1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10
=1/4-1/10
=3/20