题目内容

直接写得数
48×
3
4
=

25÷
5
6
=

6+
2
3
=

3
7
÷
3
5
=

5
6
×4=
2
5
÷
3
4
=
7
12
=
2
5
=
4
5
÷
1
5
=
5
6
-
1
2
=
3
10
×
5
9
=
3
4
-
1
8
=
15
16
÷5=
7
8
÷
1
2
=
4
7
×
3
4
=
91.5÷
3
5
=
2
5
=
4
9
=
12×
5
6
=
0.4÷
2
5
=
2
3
÷
2
7
=
3
8
×
4
9
=
1
6
×9=
2
3
÷4=
4.4×0.5=
6.4+0.43=3.14×22=3.14×102=0.63÷0.7=2.4÷0.8=
4×25%=1-75%=0.5×30%=7.2-0.4=3.4÷1.7=
0.18÷0.2=9.42÷3.14=21.98÷3.14=2-2÷9=
3
16
×
2
9
=
4
12
×4×
3
16
=
 (
1
2
+
1
3
)×6=
(18-
9
20
)÷9=
20÷
8
9
÷
3
4
=
8.8÷0.25=
4
7
+
3
4
+
1
4
=
7
9
-(
7
9
-
2
3
)=
4.5×4.4+4.6×4.5=
考点:分数的加法和减法,分数乘法,分数除法,分数的四则混合运算,小数的加法和减法,小数乘法,小数除法
专题:运算顺序及法则,运算定律及简算
分析:
1
2
+
1
3
)×6运用乘法分配律简算;
(18-
9
20
)÷9先把除法变成乘法,再运用乘法分配律简算;
20÷
8
9
÷
3
4
根据除法的性质简算;
4
7
+
3
4
+
1
4
根据加法交换律简算;
7
9
-(
7
9
-
2
3
)根据减法的性质简算;
4.5×4.4+4.6×4.5根据乘法分配律简算;
其它题目根据运算法则直接求解.
解答: 解:
48×
3
4
=36

25÷
5
6
=30

6+
2
3
=6
2
3

3
7
÷
3
5
=
5
7

5
6
×4=
10
3
2
5
÷
3
4
=
8
15
7
12
=
21
4
2
5
=20
4
5
÷
1
5
=4
5
6
-
1
2
=
1
3
3
10
×
5
9
=
1
6
3
4
-
1
8
=
5
8
15
16
÷5=
3
16
7
8
÷
1
2
=
7
4
4
7
×
3
4
=
3
7
91.5÷
3
5
=152.5
2
5
=5
4
9
=0
12×
5
6
=10
0.4÷
2
5
=1
2
3
÷
2
7
=
7
3
3
8
×
4
9
=
1
6
1
6
×9=
3
2
2
3
÷4=
1
6
4.4×0.5=2.2
6.4+0.43=6.833.14×22=12.563.14×102=3140.63÷0.7=0.92.4÷0.8=3
4×25%=11-75%=0.250.5×30%=0.157.2-0.4=6.83.4÷1.7=2
0.18÷0.2=0.99.42÷3.14=321.98÷3.14=72-2÷9=1
7
9
3
16
×
2
9
=
1
24
4
12
×4×
3
16
=
1
4
 (
1
2
+
1
3
)×6=5
(18-
9
20
)÷9=1
11
20
20÷
8
9
÷
3
4
=30
8.8÷0.25=35.2
4
7
+
3
4
+
1
4
=1
4
7
7
9
-(
7
9
-
2
3
)=
2
3
4.5×4.4+4.6×4.5=40.5
点评:本题考查了简单的运算,要注意根据运算法则和运算定律快速准确的得出答案.
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