第10页 - 江苏版实验班提优训练数学六年级上下册答案

$1-\frac{1}{2}-(1-\frac{1}{2})×\frac{1}{3}-[1-\frac{1}{2}-(1-\frac{1}{2})× \frac{1}{3}]×\frac{1}{4}=\frac{1}{4}$

$1000×\frac{1}{4}=250(毫升)\ $

$答：这时杯内还有250毫升牛奶。$

$120 × (1-\frac{1}{12})× (1-\frac{1}{11})× (1-\frac{1}{10})× (1-\frac{1}{9})=80(个) $

$答:这堆桃还有80个。$

$2022× (1-\frac{1}{2})× (1-\frac{1}{3})× (1-\frac{1}{4})×... × (1-\frac{1}{2022})\ $

$=2022×\frac{1}{2}×\frac{2}{3}×\frac{3}{4}×...×\frac{2021}{2022}\ $

$=2022×\frac{1}{2022}$

$=1 $