题目内容
脱式计算,怎样简便就怎样算
①(
-
)÷
+
②
÷
-
×
③
×[
-(
-
)]
④102×
⑤
-
+
-
⑥
÷7+
×
.
①(
1 |
2 |
1 |
4 |
1 |
3 |
1 |
6 |
②
3 |
4 |
9 |
10 |
5 |
14 |
7 |
15 |
③
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
④102×
98 |
101 |
⑤
4 |
5 |
5 |
9 |
1 |
5 |
4 |
9 |
⑥
8 |
13 |
1 |
7 |
5 |
13 |
①(
-
)÷
+
,
=
×3+
,
=
+
,
=
;
②
÷
-
×
,
=
×
-
×
,
=
-
,
=
;
③
×[
-(
-
)],
=
×[
-
],
=
×
,
=
;
④102×
,
=(101+1)×
,
=101×
+1×
,
=98+
,
=98
;
⑤
-
+
-
,
=(
+
)-(
+
),
=1-1,
=0;
⑥
÷7+
×
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
.
1 |
2 |
1 |
4 |
1 |
3 |
1 |
6 |
=
1 |
4 |
1 |
6 |
=
9 |
12 |
2 |
12 |
=
11 |
12 |
②
3 |
4 |
9 |
10 |
5 |
14 |
7 |
15 |
=
3 |
4 |
10 |
9 |
5 |
14 |
7 |
15 |
=
5 |
6 |
1 |
6 |
=
2 |
3 |
③
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
3 |
16 |
=
8 |
9 |
9 |
16 |
=
1 |
2 |
④102×
98 |
101 |
=(101+1)×
98 |
101 |
=101×
98 |
101 |
98 |
101 |
=98+
98 |
101 |
=98
98 |
101 |
⑤
4 |
5 |
5 |
9 |
1 |
5 |
4 |
9 |
=(
4 |
5 |
1 |
5 |
5 |
9 |
4 |
9 |
=1-1,
=0;
⑥
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=
1 |
7 |
5 |
13 |
8 |
13 |
=
1 |
7 |
=
1 |
7 |
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