题目内容
计算下面各题.
-
-
×[
÷(
-
)]
48×
+3÷7.
| 5 |
| 3 |
| 2 |
| 17 |
| 15 |
| 17 |
| 3 |
| 10 |
| 7 |
| 8 |
| 3 |
| 5 |
| 1 |
| 4 |
48×
| 3 |
| 7 |
计算下面各题.
-
-
,
=
-(
+
),
=
-1,
=
;
×[
÷(
-
)],
=
×[
÷
],
=
×
,
=
;
48×
+3÷7,
=48×
+
,
=(48+1)×
,
=49×
,
=21.
| 5 |
| 3 |
| 2 |
| 17 |
| 15 |
| 17 |
=
| 5 |
| 3 |
| 2 |
| 17 |
| 15 |
| 17 |
=
| 5 |
| 3 |
=
| 2 |
| 3 |
| 3 |
| 10 |
| 7 |
| 8 |
| 3 |
| 5 |
| 1 |
| 4 |
=
| 3 |
| 10 |
| 7 |
| 8 |
| 7 |
| 20 |
=
| 3 |
| 10 |
| 5 |
| 2 |
=
| 3 |
| 4 |
48×
| 3 |
| 7 |
=48×
| 3 |
| 7 |
| 3 |
| 7 |
=(48+1)×
| 3 |
| 7 |
=49×
| 3 |
| 7 |
=21.
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