题目内容
能简算的要简算.
13
| 18
|
| 13
|
(1)13
-3
-2
+2
,
=(13
+2
)-(3
+2
),
=16-6,
=10;
(2)18
÷9,
=(18+
)×
,
=18×
+
×
,
=2+
,
=2
;
(3)
×2
+2
÷1
,
=
×
+
×
,
=
+
,
=3
;
(4)13
×
+6
÷16,
=13
×
+6
×
,
=(13
+6
)×
,
=20×
,
=1
.
| 5 |
| 11 |
| 4 |
| 7 |
| 3 |
| 7 |
| 6 |
| 11 |
=(13
| 5 |
| 11 |
| 6 |
| 11 |
| 4 |
| 7 |
| 3 |
| 7 |
=16-6,
=10;
(2)18
| 9 |
| 10 |
=(18+
| 9 |
| 10 |
| 1 |
| 9 |
=18×
| 1 |
| 9 |
| 9 |
| 10 |
| 1 |
| 9 |
=2+
| 1 |
| 10 |
=2
| 1 |
| 10 |
(3)
| 5 |
| 8 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
=
| 5 |
| 8 |
| 8 |
| 3 |
| 7 |
| 3 |
| 3 |
| 4 |
=
| 5 |
| 3 |
| 7 |
| 4 |
=3
| 5 |
| 12 |
(4)13
| 7 |
| 8 |
| 1 |
| 16 |
| 1 |
| 8 |
=13
| 7 |
| 8 |
| 1 |
| 16 |
| 1 |
| 8 |
| 1 |
| 16 |
=(13
| 7 |
| 8 |
| 1 |
| 8 |
| 1 |
| 16 |
=20×
| 1 |
| 16 |
=1
| 1 |
| 4 |
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