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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