题目内容
能简算的要简算
| 1150-768÷32 |
|
1-
| ||||||||||||||||||||
|
|
|
分析:(1)先算除法,再算减法;
(2)把除以
化成乘以
,再运用乘法的分配律进行简算;
(3)先算除法,再运用减法的性质进行简算;
(4)先算小括号里的除法,再去括号从左向右进行计算即可;
(5)先算除法,再算加法;
(6)先算小括号里的加法,再算中括号里的减法,最后算括号外的除法.
(2)把除以
| 10 |
| 11 |
| 11 |
| 10 |
(3)先算除法,再运用减法的性质进行简算;
(4)先算小括号里的除法,再去括号从左向右进行计算即可;
(5)先算除法,再算加法;
(6)先算小括号里的加法,再算中括号里的减法,最后算括号外的除法.
解答:解:(1)1150-768÷32,
=1150-24,
=1126;
(2)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)1-
÷
-
,
=1-
-
,
=1-(
+
),
=1-1,
=0;
(4)
-(
÷
+
),
=
-(
+
),
=
-
-
,
=1-
,
=
;
(5)
+
÷
,
=
+
,
=2;
(6)
÷〔2-(
+
)〕,
=
÷〔2-
〕,
=
÷
,
=
.
=1150-24,
=1126;
(2)
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 10 |
| 11 |
=
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 11 |
| 10 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 10 |
=1×
| 11 |
| 10 |
=
| 10 |
| 11 |
(3)1-
| 5 |
| 8 |
| 25 |
| 28 |
| 3 |
| 10 |
=1-
| 7 |
| 10 |
| 3 |
| 10 |
=1-(
| 7 |
| 10 |
| 3 |
| 10 |
=1-1,
=0;
(4)
| 12 |
| 7 |
| 1 |
| 3 |
| 7 |
| 15 |
| 4 |
| 13 |
=
| 12 |
| 7 |
| 5 |
| 7 |
| 4 |
| 13 |
=
| 12 |
| 7 |
| 5 |
| 7 |
| 4 |
| 13 |
=1-
| 4 |
| 13 |
=
| 9 |
| 13 |
(5)
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 8 |
=
| 2 |
| 5 |
| 8 |
| 5 |
=2;
(6)
| 11 |
| 18 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 11 |
| 18 |
| 13 |
| 12 |
=
| 11 |
| 18 |
| 11 |
| 12 |
=
| 2 |
| 3 |
点评:此题考查了分数四则混合运算的顺序,注意灵活运用运算定律进行简算即可.
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