怎样算简便就怎样算.514+718+91414+78-5834-512-112415+59+1115+191314-(914+17).-五年级数学
5 |
8 |
=
1 |
4 |
1 |
4 |
=
1 |
2 |
(3)
3 |
4 |
5 |
12 |
1 |
12 |
=
3 |
4 |
5 |
12 |
1 |
12 |
=
3 |
4 |
1 |
2 |
=
1 |
4 |
(4)
4 |
15 |
5 |
9 |
11 |
15 |
1 |
9 |
=(
4 |
15 |
11 |
15 |
5 |
9 |
1 |
9 |
=1+
2 |
3 |
=1
2 |
3 |
(5)
13 |
14 |
9 |
14 |
1 |
7 |
=
13 |
14 |
9 |
14 |
1 |
7 |
=
2 |
7 |
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