题目内容
计算,能简算的要简算:
(
-
)÷(
+
)
(
×
)×27×13
100÷0.5÷0.2
×
+
÷13.
(
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 8 |
| 5 |
| 12 |
(
| 26 |
| 27 |
| 12 |
| 13 |
100÷0.5÷0.2
| 7 |
| 8 |
| 12 |
| 13 |
| 7 |
| 8 |
考点:分数的四则混合运算,运算定律与简便运算,小数四则混合运算
专题:运算顺序及法则,运算定律及简算
分析:(1)按照先同时计算括号里面的,再算括号外面的顺序计算解答,
(2)运用乘法交换和结合律解答,
(3)运用除法性质解答,
(4)运用乘法分配律解答.
(2)运用乘法交换和结合律解答,
(3)运用除法性质解答,
(4)运用乘法分配律解答.
解答:
解:(1)(
-
)÷(
+
)
=
÷
=
;
(2)(
×
)×27×13
=(
×27)×(
×13)
=26×12
=312;
(3)100÷0.5÷0.2
=100÷(0.5×0.2)
=100÷0.1
=1000;
(4)
×
+
÷13
=
×(
+
)
=
×1
=
.
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 8 |
| 5 |
| 12 |
=
| 4 |
| 15 |
| 13 |
| 24 |
=
| 32 |
| 65 |
(2)(
| 26 |
| 27 |
| 12 |
| 13 |
=(
| 26 |
| 27 |
| 12 |
| 13 |
=26×12
=312;
(3)100÷0.5÷0.2
=100÷(0.5×0.2)
=100÷0.1
=1000;
(4)
| 7 |
| 8 |
| 12 |
| 13 |
| 7 |
| 8 |
=
| 7 |
| 8 |
| 12 |
| 13 |
| 1 |
| 13 |
=
| 7 |
| 8 |
=
| 7 |
| 8 |
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题,是本题考查知识点.
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