题目内容
计算下列各题.(注意使用简便算法)
×
+
×
-
×
(35+
)÷
1÷(
+
)×
.
5 |
6 |
3 |
7 |
5 |
6 |
4 |
7 |
5 |
8 |
5 |
8 |
4 |
15 |
(35+
7 |
25 |
7 |
5 |
1÷(
3 |
4 |
1 |
2 |
5 |
8 |
(1)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(2)
-
×
,
=
×(1-
),
=
×
,
=
;
(3)(35+
)÷
,
=(35+
)×
,
=35×
+
×
,
=25+
,
=25
;
(4)1÷(
+
)×
,
=1÷
×
,
=
×
,
=
.
5 |
6 |
3 |
7 |
5 |
6 |
4 |
7 |
=
5 |
6 |
3 |
7 |
4 |
7 |
=
5 |
6 |
=
5 |
6 |
(2)
5 |
8 |
5 |
8 |
4 |
15 |
=
5 |
8 |
4 |
15 |
=
5 |
8 |
1 |
15 |
=
1 |
24 |
(3)(35+
7 |
25 |
7 |
5 |
=(35+
7 |
25 |
5 |
7 |
=35×
5 |
7 |
7 |
25 |
5 |
7 |
=25+
1 |
5 |
=25
1 |
5 |
(4)1÷(
3 |
4 |
1 |
2 |
5 |
8 |
=1÷
5 |
4 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
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