题目内容
计算下列各题.
|
(
| ||||||||||
14×
|
(
|
分析:(1)(3)按照从左到右顺序解答,
(2)运用乘法分配律解答,
(4)按照先算括号里面的减法,再按照从左到右顺序解答.
(2)运用乘法分配律解答,
(4)按照先算括号里面的减法,再按照从左到右顺序解答.
解答:解:(1)
×
÷
=
÷
=
;
(2)(
+
)×12
=
×12+
×12
=2+8
=10;
(3)14×
÷
=8÷
=21;
(4)(
-25%)×8÷
×
=
×8÷
×
=1÷
×
=
×
=3.
| 3 |
| 7 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 28 |
| 3 |
| 4 |
=
| 1 |
| 7 |
(2)(
| 1 |
| 6 |
| 2 |
| 3 |
=
| 1 |
| 6 |
| 2 |
| 3 |
=2+8
=10;
(3)14×
| 4 |
| 7 |
| 8 |
| 21 |
=8÷
| 8 |
| 21 |
=21;
(4)(
| 3 |
| 8 |
| 5 |
| 6 |
| 5 |
| 2 |
=
| 1 |
| 8 |
| 5 |
| 6 |
| 5 |
| 2 |
=1÷
| 5 |
| 6 |
| 5 |
| 2 |
=
| 6 |
| 5 |
| 5 |
| 2 |
=3.
点评:(1)正确运用乘法分配律解决问题,(2)依据四则运算计算方法正确进行计算,是本题考查知识点.
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