题目内容
用简便算法计算
÷7+
×
+(
+
)×
×16-
.
8 |
13 |
1 |
7 |
5 |
13 |
2 |
3 |
8 |
7 |
1 |
2 |
7 |
24 |
8 |
15 |
8 |
15 |
(1)
÷7+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)
+(
+
)×
,
=
+
×
,
=
+
,
=
;
(3)
×16-
,
=
×(16-1),
=
×15,
=8.
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 |
(2)
2 |
3 |
8 |
7 |
1 |
2 |
7 |
24 |
=
2 |
3 |
23 |
14 |
7 |
24 |
=
2 |
3 |
23 |
48 |
=
55 |
48 |
(3)
8 |
15 |
8 |
15 |
=
8 |
15 |
=
8 |
15 |
=8.
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