题目内容
脱式计算,能简算的要简算.
-(
-
)
+
-
32-
-
-
+
-
.
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 9 |
| 1 |
| 2 |
| 4 |
| 5 |
| 3 |
| 10 |
| 7 |
| 15 |
| 8 |
| 15 |
| 9 |
| 10 |
| 3 |
| 4 |
| 1 |
| 10 |
| 1 |
| 4 |
分析:(1)按照先算括号里面的,再算括号外面的顺序解答,
(2)按照从左到右顺序解答,
(3)运用减法性质解答,
(4)运用减法性质,以及加法交换律解答.
(2)按照从左到右顺序解答,
(3)运用减法性质解答,
(4)运用减法性质,以及加法交换律解答.
解答:解:(1)
-(
-
),
=
-
,
=
;
(2)
+
-
,
=
-
,
=1;
(3)32-
-
,
=32-(
+
),
=32-1,
=31;
(4)
-
+
-
,
=(
+
)-(
+
),
=1-1,
=0.
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 9 |
=
| 5 |
| 6 |
| 5 |
| 9 |
=
| 5 |
| 18 |
(2)
| 1 |
| 2 |
| 4 |
| 5 |
| 3 |
| 10 |
=
| 13 |
| 10 |
| 3 |
| 10 |
=1;
(3)32-
| 7 |
| 15 |
| 8 |
| 15 |
=32-(
| 7 |
| 15 |
| 8 |
| 15 |
=32-1,
=31;
(4)
| 9 |
| 10 |
| 3 |
| 4 |
| 1 |
| 10 |
| 1 |
| 4 |
=(
| 9 |
| 10 |
| 1 |
| 10 |
| 3 |
| 4 |
| 1 |
| 4 |
=1-1,
=0.
点评:本题考查知识点:(1)按照四则运算顺序正确进行计算,(2)简便算法正确运用.
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