问题
解答题
|
答案
(1)9.4×
1 |
4 |
3 |
5 |
=9.4×0.25+0.25×0.6,
=(9.4+0.6)×0.25,
=10×0.25,
=2.5;
(2)
1 |
6 |
3 |
5 |
3 |
10 |
=
1 |
6 |
3 |
10 |
=
1 |
6 |
10 |
3 |
=
1 |
20 |
(3)(
7 |
10 |
5 |
6 |
4 |
5 |
=(
7 |
10 |
5 |
6 |
4 |
5 |
=(
7 |
10 |
5 |
6 |
4 |
5 |
=
7 |
10 |
5 |
6 |
4 |
5 |
=42+50-48,
=92-48,
=44;
(4)
3 |
14 |
3 |
4 |
1 |
10 |
=
3 |
14 |
3 |
4 |
1 |
20 |
=
3 |
14 |
14 |
20 |
=
3 |
20 |