
用你喜欢的方法计算下面各题.(1)208×35÷(100-48) (2)813÷7+17×513 (3)2-613÷926-23
用你喜欢的方法计算下面各题.(1)208×35÷(100-48)(2)813÷7+17×513(3)2-613÷926-23(4)〔1415-(25+13)〕÷710....
用你喜欢的方法计算下面各题.(1)208×35÷(100-48) (2)813÷7+17×513 (3)2-613÷926-23 (4)〔1415-(25+13)〕÷710.
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(1)208×35÷(100-48)
=208×35÷52,
=208÷52×35,
=4×35,
=140;
(2)
÷7+
×
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)2-
÷
-
=2-
-
,
=2-(
+
),
=2-2,
=0;
(4)[
-(
+
)]÷
=[
-
]×
,
=
×
,
=
.
=208×35÷52,
=208÷52×35,
=4×35,
=140;
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)2-
6 |
13 |
9 |
26 |
2 |
3 |
=2-
4 |
3 |
2 |
3 |
=2-(
4 |
3 |
2 |
3 |
=2-2,
=0;
(4)[
14 |
15 |
2 |
5 |
1 |
3 |
7 |
10 |
=[
14 |
15 |
11 |
15 |
10 |
7 |
=
1 |
5 |
10 |
7 |
=
2 |
7 |
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