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下面各题,怎样算简便就怎样算.①9.56+4.875-78+1.44②34÷6-16×14③13÷(14+56)×34④89×[34-(716-14)]⑤[1-(38+14)]×239⑥815×[56÷(79−13)].
题目详情
下面各题,怎样算简便就怎样算. ①9.56+4.875-
| ②
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③13÷(
| ④
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⑤[1-(
| ⑥
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▼优质解答
答案和解析
①9.56+4.875-
+1.44,
=(9.56+1.44)+(4.875-
),
=11+4,
=15;
②
÷6-
×
,
=
×
-
×
,
=
×(
-
),
=
×
,
=
;
③13÷(
+
)×
,
=13÷
×
,
=13×
×
,
=9;
④
×[
-(
-
)],
=
×[
-
],
=
×
7 |
8 |
=(9.56+1.44)+(4.875-
7 |
8 |
=11+4,
=15;
②
3 |
4 |
1 |
6 |
1 |
4 |
=
3 |
4 |
1 |
6 |
1 |
6 |
1 |
4 |
=
1 |
6 |
3 |
4 |
1 |
4 |
=
1 |
6 |
1 |
2 |
=
1 |
12 |
③13÷(
1 |
4 |
5 |
6 |
3 |
4 |
=13÷
13 |
12 |
3 |
4 |
=13×
12 |
13 |
3 |
4 |
=9;
④
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
3 |
16 |
=
8 |
9 |
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