题目内容
0.75÷
|
| ||||||||||
(
|
25×(
|
分析:(1)运用除法性质解答,
(2)按照从左到右顺序解答,
(3)(4)运用乘法分配律解答.
(2)按照从左到右顺序解答,
(3)(4)运用乘法分配律解答.
解答:解:(1)0.75÷
÷
=0.75÷(
×
)
=0.75÷0.3
=2.5;
(2)
÷
×
=
×
=
;
(3)(
+
)×
=
×
+
×
=
+
=
;
(4)25×(
-
)
=25×
-25×
=10-8
=1
.
| 3 |
| 8 |
| 4 |
| 5 |
=0.75÷(
| 3 |
| 8 |
| 4 |
| 5 |
=0.75÷0.3
=2.5;
(2)
| 11 |
| 24 |
| 7 |
| 8 |
| 21 |
| 44 |
=
| 11 |
| 21 |
| 21 |
| 44 |
=
| 1 |
| 4 |
(3)(
| 2 |
| 5 |
| 8 |
| 15 |
| 5 |
| 8 |
=
| 2 |
| 5 |
| 5 |
| 8 |
| 8 |
| 15 |
| 5 |
| 8 |
=
| 1 |
| 4 |
| 1 |
| 3 |
=
| 7 |
| 12 |
(4)25×(
| 2 |
| 5 |
| 1 |
| 3 |
=25×
| 2 |
| 5 |
| 1 |
| 3 |
=10-8
| 1 |
| 3 |
=1
| 2 |
| 3 |
点评:本题考查知识点:(1)运用简便方法解决问题,(2)依据四则运算计算方法正确进行计算.
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