精英家教网 > 小学数学 > 题目详情
3
4
÷
5
6
=
1
3
÷3=
5
4
×
2
3
×
4
5
=
1
3
×9×
2
3
=
6
7
÷2=
5
6
-
5
6
÷5=
7-
9
10
=
(1.6+3.2)×0.125=
5
12
=
分析:①、②、⑤根据除以一个数等于乘以这个数的倒数计算,
③利用乘法的交换律计算,
④、⑥、⑦、⑨按分数的四则混合运算顺序计算,
⑧利用乘法的结合律计算.
解答:
解:①
3
4
÷
5
6

=
3
4
×
6
5

=
9
10

1
3
÷3,
=
1
3
×
1
3

=
1
9

5
4
×
2
3
×
4
5

=
5
4
×
4
5
×
2
3

=1×
2
3

=
2
3

1
3
×9×
2
3

=
9×2
3×3

=2;
6
7
÷2,
=
6
7
×
1
2

=
3
7

⑥5÷
5
6
-
5
6
÷5,
=5×
6
5
-
5
6
×
1
5

=6-
1
6

=5
5
6

⑦7-
9
10
=6
1
10

⑧(1.6+3.2)×0.125,
=(0.2+0.4)×8×0.125,
=(0.2+0.4)×(8×0.125),
=0.6×1,
=0.6;
⑨6×
5
12
=
5
2
点评:此题考查了分数的乘除法以及运算定律的运用.
练习册系列答案
相关习题

科目:小学数学 来源: 题型:

直接写出得数:
3
4
÷
5
6
=
1
3
÷3=
5
4
×
2
3
×
4
5
=
1
3
×9×
2
3
=
6
7
÷2=
5
6
-
5
6
÷5=
2.7-
9
10
=
5
12
=
(1.6+3.2)×0.125=
3
4
=
2
5
÷10=
5
8
=
1-75%=
3
2
÷
5
2
=
1
7
×
7
12
=
5÷1%=
1
3
=

查看答案和解析>>

科目:小学数学 来源: 题型:

1.8+0.5= 2.5-0.1= 4.8-0.2= 74+71=
48+10= 24÷12= 68÷0.68= 94.7÷0.1=
61.8÷0.6= 0.8×6.7= 3÷8= 0.12×3=
32= 8.2-2.8= 3.5÷0.7=
4
5
-
1
5
=
1
3
+
1
4
=
1
16
+
7
16
=
5.3+0.5= 46+18=
8.5-1.5= 69+10= 28.8+0.4= 40.5÷0.5=
92.7÷0.3= 0.5×1.3= 16×0.5= 4.4+0.1=
6.1-0.1= 3.3+0.6= 33.2÷0.4= 1÷0.25=
1.5×4= 6.5+1.35= 1.3-1.2=
7
8
-
1
4
=
1
2
+
3
4
=
5
6
-
1
3
=
5.7-1.7= 0.35+0.75=
0.2×1.1= 1.6÷0.4= 10÷4= 3.4÷0.2=
52÷13= 57÷19= 3.7-0.8= 29+92=
8.2+0.7= 6.5-5.6= 4.8÷0.3= 33=
1.25×8=
2
3
+
1
6
=
1
2
-
1
3
=
7
9
+
1
9
=
2.1÷0.3= 3.2×3= 2.8-1.8= 0.9×6.2=

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写出得数
3
4
÷
5
6
=
1
3
÷3=
6
7
÷2=
5
12
=
5
8
-
1
4
=
7
9
=
3
4
+
1
2
=
5
6
÷6=
2
21
×7=
10
7
÷
5
21
=

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写出得数:
3
4
÷
5
6
=
1
3
÷3=
5
4
×
2
3
×
4
5
=
6
7
÷2=
5
12
=
1
3
×9×
2
3
=
5
6
-
5
6
÷5=
2.7-
9
10
=
(1.6+3.2)×0.125=

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写出得数
3
4
÷
5
6
=
1
3
÷3=
5
12
=
5
8
-
1
4
=
7
9
=
3
4
+
1
2
=
2
21
×7=
10
7
÷
5
21
=

查看答案和解析>>

同步练习册答案