题目内容
计算(能简算的要简算).
÷(1-
)×
×
+40%×
3÷
-
÷3
×
+
÷
.
| 5 |
| 6 |
| 9 |
| 20 |
| 1 |
| 5 |
| 2 |
| 5 |
| 6 |
| 11 |
| 5 |
| 11 |
3÷
| 3 |
| 7 |
| 3 |
| 7 |
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
分析:(1)先算出括号里面的,再按照从左到右顺序计算解答,
(2)化40%=
,再运用乘法分配律解答,
(3)先算除法,再算减法解答,
(4)运用乘法分配律解答.
(2)化40%=
| 2 |
| 5 |
(3)先算除法,再算减法解答,
(4)运用乘法分配律解答.
解答:解:(1)
÷(1-
)×
,
=
÷
×
,
=
×
,
=
;
(2)
×
+40%×
,
=
×(
+
),
=
×1,
=
;
(3)3÷
-
÷3,
=7-
,
=6
;
(4)
×
+
÷
,
=
×(
+
),
=
×2,
=1
.
| 5 |
| 6 |
| 9 |
| 20 |
| 1 |
| 5 |
=
| 5 |
| 6 |
| 11 |
| 20 |
| 1 |
| 5 |
=
| 50 |
| 33 |
| 1 |
| 5 |
=
| 10 |
| 33 |
(2)
| 2 |
| 5 |
| 6 |
| 11 |
| 5 |
| 11 |
=
| 2 |
| 5 |
| 6 |
| 11 |
| 5 |
| 11 |
=
| 2 |
| 5 |
=
| 2 |
| 5 |
(3)3÷
| 3 |
| 7 |
| 3 |
| 7 |
=7-
| 1 |
| 7 |
=6
| 6 |
| 7 |
(4)
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
=
| 5 |
| 8 |
| 7 |
| 4 |
| 1 |
| 4 |
=
| 5 |
| 8 |
=1
| 1 |
| 4 |
点评:本题主要考查学生运用四则运算计算方法,以及运用乘法分配律解决问题的能力.
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