怎样算简便就怎样算.[(1419
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/20 13:23:50
怎样算简便就怎样算.
[(
[(
14 |
19 |
(1)[(
14
19-
5
13)+
5
19-
8
13]÷
11
12,
=[
14
19-
5
13+
5
19-
8
13]÷
11
12,
=[
14
19+
5
19-(
5
13+
8
13)]÷
11
12,
=[1-1]÷
11
12,
=0;
(2)34×(
1
17+
1
13)×13,
=34×
1
17×13+34×
1
13×13,
=26+34,
=60;
(3)[1-(
1
2-
1
4)]×
2
3,
=[1-
1
4]×
2
3,
=
3
4×
2
3,
=
1
2;
(4)1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000.
14
19-
5
13)+
5
19-
8
13]÷
11
12,
=[
14
19-
5
13+
5
19-
8
13]÷
11
12,
=[
14
19+
5
19-(
5
13+
8
13)]÷
11
12,
=[1-1]÷
11
12,
=0;
(2)34×(
1
17+
1
13)×13,
=34×
1
17×13+34×
1
13×13,
=26+34,
=60;
(3)[1-(
1
2-
1
4)]×
2
3,
=[1-
1
4]×
2
3,
=
3
4×
2
3,
=
1
2;
(4)1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000.