计算下面各题,能简便的要用简便方法计算
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/04 05:52:47
计算下面各题,能简便的要用简便方法计算
180+1350÷18×6; 10.6-0.2×1.9-5.62;
180+1350÷18×6; 10.6-0.2×1.9-5.62;
19 |
20 |
![计算下面各题,能简便的要用简便方法计算](/uploads/image/z/18221210-26-0.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98%EF%BC%8C%E8%83%BD%E7%AE%80%E4%BE%BF%E7%9A%84%E8%A6%81%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
(1)180+1350÷18×6
=180+75×6
=180+450
=630;
(2)10.6-0.2×1.9-5.62
=10.6-0.38-5.62
=10.6-(0.38+5.62)
=10.6-6
=4.6;
(3)
19
20×21
=
19
20×20+
19
20×1
=19+
19
20
=19
19
20;
(4)
17
12×
1
5-
5
12÷5
=
17
12×
1
5-
5
12×
1
5
=(
17
12-
5
12)×
1
5
=1×
1
5
=
1
5;
(5)7+
1
6×
3
4+
7
8
=7+
1
8+
7
8
=7+(
1
8+
7
8)
=7+1
=8;
(6)
5
8÷[
13
12-(
1
12+
1
4)]
=
5
8÷[
=180+75×6
=180+450
=630;
(2)10.6-0.2×1.9-5.62
=10.6-0.38-5.62
=10.6-(0.38+5.62)
=10.6-6
=4.6;
(3)
19
20×21
=
19
20×20+
19
20×1
=19+
19
20
=19
19
20;
(4)
17
12×
1
5-
5
12÷5
=
17
12×
1
5-
5
12×
1
5
=(
17
12-
5
12)×
1
5
=1×
1
5
=
1
5;
(5)7+
1
6×
3
4+
7
8
=7+
1
8+
7
8
=7+(
1
8+
7
8)
=7+1
=8;
(6)
5
8÷[
13
12-(
1
12+
1
4)]
=
5
8÷[