1又3/14-19/21 1.4-4/9-2/5+2/3 1/2+2/5-3/10+0.6 1/2+3/4+7/8+15/16+31/32+63/64

问题描述:

1又3/14-19/21 1.4-4/9-2/5+2/3 1/2+2/5-3/10+0.6 1/2+3/4+7/8+15/16+31/32+63/64
1又3/14-19/21 1.4-4/9-2/5+2/3 1/2+2/5-3/10+0.6 1/2+3/4+7/8+15/16+31/32+63/64

1又3/14-19/21=13/42
1.4-4/9-2/5+2/3=1
1/2+2/5-3/10+0.6=1又1/5
/2+3/4+7/8+15/16+31/32+63/64=5又1/64