Question

【题目】计算：

3÷ =	÷10=	÷ =	﹣ =
18× =	÷ =	÷（1﹣ × ）	×[ ÷（ + ）]
（ ﹣ × ）÷	+ × ×	9× + ÷	（ + ）×8+ ．

Answer 1

【答案】解：
①3÷ =3× =14
② ÷10= × =
③ ÷ = × =
④ ﹣ = ﹣ =
⑤18× =3
⑥ ÷ = × =
⑦ ÷（1﹣ × ）
= ÷（1﹣ ）
= ÷
= ×
=
⑧ ×[ ÷（ + ）]
= ×[ ÷ ]
= ×[ × ]
= ×
=
⑨（ ﹣ × ）÷
=（ ﹣ ）÷
= ÷
= ×
=
⑩ + × ×
= +
= +
=
=
9× + ÷
=9× + ×9
= ×（9+9）
= ×18
=15
（ + ）×8+
= ×8+ ×8+
=3+ +
=3+（ + ）
=3+
=3+1
=4
【解析】①②③④⑤⑥根据分数加减乘除法的计算方法解答；⑦⑧⑨⑩根据分数四则混合运算的法则解答；先将分数除法转化成分数乘法，再根据乘法分配律进行简算；根据乘法分配律和加法结合律进行简算．进行分数的四则运算及四则混合运算时，要注意数据特点和运算符号，注意运算顺序，能运用运算定律和性质进行简算的要简算．