以下几题怎么算?1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1-1/6-1/12-1/20以下简便计算:999+999×999 1/99+2/99+3/99...+98/99 3333×24+1111×28 56×295+56×6-56
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![以下几题怎么算?1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1-1/6-1/12-1/20以下简便计算:999+999×999 1/99+2/99+3/99...+98/99 3333×24+1111×28 56×295+56×6-56](/uploads/image/z/1264009-49-9.jpg?t=%E4%BB%A5%E4%B8%8B%E5%87%A0%E9%A2%98%E6%80%8E%E4%B9%88%E7%AE%97%3F1%2F6%3D1%2F2%C3%973%3D1%2F2-1%2F3+1%2F12%3D1%2F3%C3%974%3D1%2F3-1%2F4+1-1%2F6-1%2F12-1%2F20%E4%BB%A5%E4%B8%8B%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A999%2B999%C3%97999+1%2F99%2B2%2F99%2B3%2F99...%2B98%2F99+3333%C3%9724%2B1111%C3%9728+56%C3%97295%2B56%C3%976-56)
以下几题怎么算?1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1-1/6-1/12-1/20以下简便计算:999+999×999 1/99+2/99+3/99...+98/99 3333×24+1111×28 56×295+56×6-56
以下几题怎么算?1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1-1/6-1/12-1/20
以下简便计算:999+999×999 1/99+2/99+3/99...+98/99 3333×24+1111×28 56×295+56×6-56
以下几题怎么算?1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1-1/6-1/12-1/20以下简便计算:999+999×999 1/99+2/99+3/99...+98/99 3333×24+1111×28 56×295+56×6-56
1-1/6-1/12-1/20
=1-(1/2-1/3)-(1/3-1/4)-(1/4-1/5)
=1-1/2+1/3-1/3+1/4-1/4+1/5
=1.2
999+999×999
=999×(1+999)
=999×1000
=999000
1/99+2/99+3/99...+98/99
3333×24+1111×28
=1111×72+1111×28
=1111×100
=111100
56×295+56×6-56
=59×(295+6-1)‘
=59×300
=17700
1.1000*999
2.(1+2+3+...98)/99={(1+98)*49}/99=49
3.3*1111*24+1111*28=1111(3*24+28)=1111*100=111100
4.56(295+6-1)=56*300=