脱式计算能简算的要简算.(1)27-15+1235(2)821+(314-17)(3)1-[1760-(215+320)](4)517+813+217+513(5)35-711-411(6)78+34-78+34.-数学
),
=
+
,
=
;
(3)1-[
-(
+
)],
=1-[
-
],
=1-0,
=1;
(4)
+
+
+
,
=(
+
)+(
+
),
=
+1,
=1
;
(5)35-
-
,
=35-(
+
),
=35-1,
=34;
(6)
+
-
+
,
=(
-
)+(
+
),
=0+
=
8 |
21 |
1 |
14 |
=
19 |
42 |
(3)1-[
17 |
60 |
2 |
15 |
3 |
20 |
=1-[
17 |
60 |
17 |
60 |
=1-0,
=1;
(4)
5 |
17 |
8 |
13 |
2 |
17 |
5 |
13 |
=(
5 |
17 |
2 |
17 |
8 |
13 |
5 |
13 |
=
7 |
17 |
=1
7 |
17 |
(5)35-
7 |
11 |
4 |
11 |
=35-(
7 |
11 |
4 |
11 |
=35-1,
=34;
(6)
7 |
8 |
3 |
4 |
7 |
8 |
3 |
4 |
=(
7 |
8 |
7 |
8 |
3 |
4 |
3 |
4 |
=0+
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