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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