2/1+4/3+7/8+16/15+32/31+64/63
1/2+3/4+7/8+15/16+31/32+63/64+128/127+255/256
1/2+3/4+7/8+15/16+31/32+63/64+127/128+255/256
简算1/2+3/4+7/8+15/16+31/32+63/64
2/1+4/3+8/7+16/15+32/31+64/63+.+128/127
1/2+3/4+7/8+15/16+31/32+63/64=127/128=?
简便计算:1/2+3/4+7/8+15/16+31/32+63/64+127+218
简便计算:1/2+3/4+7/8+15/16+31/32+63/64+127/218
1/2+3/4+7/8+15/16+31/32+63/64=?简便方法!
1/2+3/4+7/8+15/16+31/32+63/64+127/128
2/1+4/3+8/7+16/15+32/31+64/63 要简算
计算:1/2+3/4+7/8+15/16+31/32+63/64=?
分数计算题:1/2+3/4+7/8+15/16+31/32+63/64