问题
解答题
用你喜欢的方法计算 (1)1375+360÷90×250 (2)81÷14+17×
(3)
(4)
|
答案
(1)1375+360÷90×250,
=1375+40×250,
=1375+1000,
=2375;
(2)81÷14+17×
1 |
14 |
=81×
1 |
14 |
1 |
14 |
=(81+17)×
1 |
14 |
=98×
1 |
14 |
=7;
(3)
3 |
5 |
1 |
7 |
8 |
21 |
2 |
3 |
=
3 |
5 |
1 |
7 |
4 |
7 |
=
3 |
5 |
5 |
7 |
=
3 |
7 |
(4)
2006 |
2007 |
=
2006 |
2007 |
=
2006 |
2007 |
2006 |
2007 |
=2007+
2006 |
2007 |
=2007
2006 |
2007 |