题目内容
计算下面各题.
(
|
0.24×5+0.96÷1.2 | (
|
|
分析:(1)根据乘法分配律进行计算;
(2)先算乘法和除法,再算加法;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算.
(2)先算乘法和除法,再算加法;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算.
解答:解:(1)(
-
+
)×12,
=
×12-
×12+
×12,
=9-6+2,
=3+2,
=5;
(2)0.24×5+0.96÷1.2,
=1.2+0.8,
=2;
(3)(
-
)÷
+
,
=(
-
)×4+
,
=
×4-
×4+
,
=1-
+
,
=1;
(4)
×
+
÷10,
=
×
+
×
,
=
×(
+
),
=
×1,
=
.
3 |
4 |
1 |
2 |
1 |
6 |
=
3 |
4 |
1 |
2 |
1 |
6 |
=9-6+2,
=3+2,
=5;
(2)0.24×5+0.96÷1.2,
=1.2+0.8,
=2;
(3)(
1 |
4 |
1 |
5 |
1 |
4 |
4 |
5 |
=(
1 |
4 |
1 |
5 |
4 |
5 |
=
1 |
4 |
1 |
5 |
4 |
5 |
=1-
4 |
5 |
4 |
5 |
=1;
(4)
17 |
18 |
9 |
10 |
17 |
18 |
=
17 |
18 |
9 |
10 |
17 |
18 |
1 |
10 |
=
17 |
18 |
9 |
10 |
1 |
10 |
=
17 |
18 |
=
17 |
18 |
点评:四则运算,先弄清运算顺序,然后再进一步计算,能简算的要简算.
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