题目内容
能简算的要简算.
(
-
)÷
;
136×0.5+64×50%;
÷7+
×
;
0.2×
+
×
+
×20%.
(
| 5 |
| 12 |
| 1 |
| 4 |
| 5 |
| 6 |
136×0.5+64×50%;
| 8 |
| 13 |
| 1 |
| 7 |
| 7 |
| 13 |
0.2×
| 6 |
| 13 |
| 1 |
| 5 |
| 9 |
| 13 |
| 11 |
| 13 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)按照先算括号里面的,再算括号外面的顺序计算解答,
(2)(3)(4)运用乘法分配律解答.
(2)(3)(4)运用乘法分配律解答.
解答:
解:(1)(
-
)÷
=
÷
=
;
(2)136×0.5+64×50%
=(136+64)×50%
=100×50%
=50;
(3)
÷7+
×
=
×(
+
)
=
×1
=
;
(4)0.2×
+
×
+
×20%
=0.2×(
+
+
)
=0.2×2
=0.4.
| 5 |
| 12 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 6 |
=
| 1 |
| 5 |
(2)136×0.5+64×50%
=(136+64)×50%
=100×50%
=50;
(3)
| 8 |
| 13 |
| 1 |
| 7 |
| 7 |
| 13 |
=
| 1 |
| 7 |
| 8 |
| 13 |
| 7 |
| 13 |
=
| 1 |
| 7 |
=
| 1 |
| 7 |
(4)0.2×
| 6 |
| 13 |
| 1 |
| 5 |
| 9 |
| 13 |
| 11 |
| 13 |
=0.2×(
| 6 |
| 13 |
| 9 |
| 13 |
| 11 |
| 13 |
=0.2×2
=0.4.
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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