问题
解答题
用简便方法计算 (1)22×
(2)1+44×17÷11÷34 (3)(
(4)2012÷2012
|
答案
(1)22×
55 |
56 |
1 |
56 |
=22
55 |
56 |
1 |
56 |
=22×1,
=22;
(2)1+44×17÷11÷34,
=1+44×17×
1 |
11 |
1 |
34 |
=1+2,
=3;
(3)(
5 |
7 |
2 |
3 |
5 |
21 |
=(
5 |
7 |
2 |
3 |
21 |
5 |
=
5 |
7 |
2 |
3 |
=15-14,
=1;
(4)2012÷2012
2012 |
2013 |
=2012÷
2012×2013+2012 |
2013 |
=2012÷
2012×(2013+1) |
2013 |
=2012×
2013 |
2012×(2013+1) |
=
2013 |
2013+1 |
=
2013 |
2014 |