0.5+0.25+0.125+0.0625+0.0

0.5+0.25+0.125+0.0625+0.03125怎样速算

3个回答

0.5+0.25+0.125+0.0625+0.03125
=0.03125*16+0.03125*8+0.03125*2+0.03125*1
=0.03125（16+8+2+1）
=0.84375