Question

直接寫(xiě)數(shù)．

7× 3 14 =	3 7 ÷6=	4 5 ÷ 5 4 =	5 14 ÷ 5 14 =
1 8 ÷ 5 2 =	1 2 × 1 3 ÷ 1 3 × 1 2 =	4 9 ×3=	5÷ 1 3 =
1 2 ÷ 1 3 =	1 3 ×2=	3 8 ÷ 3 4 =	1 2 + 1 3 =
1÷3× 1 3 =	2 7 × 3 9 ÷ 2 7 =

Answer 1

考點(diǎn)：分?jǐn)?shù)乘法,分?jǐn)?shù)除法,分?jǐn)?shù)的四則混合運(yùn)算

專(zhuān)題：計(jì)算題

分析：

1

2

×

1

3

÷

1

3

×

1

2

改寫(xiě)成

1

3

÷

1

3

×

1

2

×

1

2

計(jì)算，

2

7

×

3

9

÷

2

7

改寫(xiě)成

2

7

÷

2

7

×

3

9

計(jì)算；
1÷3×

1

3

，從左往右按順序計(jì)算；

1

2

+

1

3

，先通分成同分母分?jǐn)?shù)再計(jì)算；
其它算式按照分?jǐn)?shù)乘除法的計(jì)算方法口算得解．

解答：

解：7× 3 14 = 3 2	3 7 ÷6= 1 14	4 5 ÷ 5 4 = 16 25	5 14 ÷ 5 14 =1
1 8 ÷ 5 2 = 1 20	1 2 × 1 3 ÷ 1 3 × 1 2 = 1 4	4 9 ×3= 4 3	5÷ 1 3 =15
1 2 ÷ 1 3 = 3 2	1 3 ×2= 2 3	3 8 ÷ 3 4 = 1 2	1 2 + 1 3 = 5 6
1÷3× 1 3 = 1 9	2 7 × 3 9 ÷ 2 7 = 1 3 ．

點(diǎn)評(píng)：此題考查簡(jiǎn)單的分?jǐn)?shù)乘除法運(yùn)算，屬于基本試題，注意認(rèn)真分析式中數(shù)據(jù)，然后快速準(zhǔn)確得出答案；注意如果是分?jǐn)?shù)的結(jié)果，要化簡(jiǎn)成最簡(jiǎn)分?jǐn)?shù)．