简便运算:8+2001×(18−12009)+8×(12001−12009
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/17 04:58:08
简便运算:8+2001×(
−
)+8×(
−
1 |
8 |
1 |
2009 |
1 |
2001 |
1 |
2009 |
![简便运算:8+2001×(18−12009)+8×(12001−12009](/uploads/image/z/7481913-33-3.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A8%2B2001%C3%97%2818%E2%88%9212009%29%2B8%C3%97%2812001%E2%88%9212009)
8+2001×(
1
8-
1
2009)+8×(
1
2001-
1
2009)-2009×(
1
8+
1
2001)
=8+
2001
8-
2001
2009+
8
2001-
8
2009-
2009
8-
2009
2001
=8+(
2001
8-
2009
8)-(
2001
2009+
8
2009)-(
2009
2001-
8
2001)
=8-1-1-1
=5
1
8-
1
2009)+8×(
1
2001-
1
2009)-2009×(
1
8+
1
2001)
=8+
2001
8-
2001
2009+
8
2001-
8
2009-
2009
8-
2009
2001
=8+(
2001
8-
2009
8)-(
2001
2009+
8
2009)-(
2009
2001-
8
2001)
=8-1-1-1
=5