题目内容
计算,能简算的要简算.
+(
-
)÷
÷7+
×
×4+
÷4
(12÷
+19)×
÷
+
÷
÷(
×
+
)
| 5 |
| 16 |
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 11 |
| 6 |
| 7 |
| 3 |
| 11 |
| 2 |
| 7 |
| 4 |
| 7 |
(12÷
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
| 2 |
| 7 |
| 1 |
| 2 |
| 6 |
| 11 |
| 2 |
| 5 |
| 7 |
| 11 |
| 1 |
| 2 |
分析:自上往下数:
(1)(4)(5)(6)依据四则运算顺序:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序就是,有括号先算括号里面的顺序解答;
(2)(3)运用乘法分配律解答.
(1)(4)(5)(6)依据四则运算顺序:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序就是,有括号先算括号里面的顺序解答;
(2)(3)运用乘法分配律解答.
解答:解:
+(
-
)÷
=
+
÷
=
+
=1
;
÷7+
×
=
×(
+
)
=
×1
=
;
×4+
÷4
=
+
=1;
(12÷
+19)×
=(9+19)×
=28×
=11
;
÷
+
÷
=3+
=3
;
÷(
×
+
)
=
÷(
+
)
=
÷
=
.
| 5 |
| 16 |
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 5 |
| 16 |
| 5 |
| 8 |
| 1 |
| 2 |
=
| 5 |
| 16 |
| 5 |
| 4 |
=1
| 9 |
| 16 |
| 3 |
| 11 |
| 6 |
| 7 |
| 3 |
| 11 |
=
| 3 |
| 11 |
| 1 |
| 7 |
| 6 |
| 7 |
=
| 3 |
| 11 |
=
| 3 |
| 11 |
| 2 |
| 7 |
| 4 |
| 7 |
=
| 8 |
| 7 |
| 1 |
| 7 |
=1;
(12÷
| 3 |
| 4 |
| 2 |
| 5 |
=(9+19)×
| 2 |
| 5 |
=28×
| 2 |
| 5 |
=11
| 1 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
| 2 |
| 7 |
| 1 |
| 2 |
=3+
| 4 |
| 7 |
=3
| 4 |
| 7 |
| 6 |
| 11 |
| 2 |
| 5 |
| 7 |
| 11 |
| 1 |
| 2 |
=
| 6 |
| 11 |
| 14 |
| 55 |
| 1 |
| 2 |
=
| 6 |
| 11 |
| 83 |
| 110 |
=
| 60 |
| 83 |
点评:(1)按照四则运算顺序正确进行计算,(2)运用乘法分配律解决问题,是本题考查知识点.
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