题目内容
我会计算下列各题.
(1)
÷1
×
(2)3.75×2
÷1
(3)
÷
-
×
(4)(16
-15.3)×
×2.4
(5)(4
-2
)÷1
+
.
(1)
3 |
25 |
3 |
5 |
5 |
8 |
(2)3.75×2
2 |
5 |
1 |
3 |
(3)
16 |
3 |
4 |
5 |
1 |
3 |
3 |
4 |
(4)(16
1 |
10 |
1 |
6 |
(5)(4
1 |
4 |
5 |
6 |
8 |
9 |
1 |
3 |
分析:按照分数四则混合运算顺序:先算乘除,再算加减,有括号的,先算括号里面的计算即可.
解答:解:(1)
÷1
×
,
=
×
×
,
=
;
(2)3.75×2
÷1
,
=
×
×
,
=
;
(3)
÷
-
×
,
=
-
,
=6
;
(4)(16
-15.3)×
×2.4,
=0.8×
×2.4,
=0.32;
(5)(4
-2
)÷1
+
,
=
÷
+
,
=
+
,
=
.
3 |
25 |
3 |
5 |
5 |
8 |
=
3 |
25 |
5 |
8 |
5 |
8 |
=
3 |
64 |
(2)3.75×2
2 |
5 |
1 |
3 |
=
15 |
4 |
12 |
5 |
3 |
4 |
=
27 |
4 |
(3)
16 |
3 |
4 |
5 |
1 |
3 |
3 |
4 |
=
20 |
3 |
1 |
4 |
=6
5 |
12 |
(4)(16
1 |
10 |
1 |
6 |
=0.8×
1 |
6 |
=0.32;
(5)(4
1 |
4 |
5 |
6 |
8 |
9 |
1 |
3 |
=
17 |
12 |
17 |
9 |
1 |
3 |
=
3 |
4 |
1 |
3 |
=
13 |
12 |
点评:本题考查了学生通过约分对分数四则混合运题目进行简算的能力.
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