下面各题怎样算简便就怎样算.47+16-472-79-2935+78+2556-310+16-71025+13+35512+59-512.-数学
=2-1,
=1;
(3)
3 |
5 |
7 |
8 |
2 |
5 |
=
3 |
5 |
2 |
5 |
7 |
8 |
=1+
7 |
8 |
=1
7 |
8 |
(4)
5 |
6 |
3 |
10 |
1 |
6 |
7 |
10 |
=(
5 |
6 |
1 |
6 |
3 |
10 |
7 |
10 |
=1-1,
=0;
(5)
2 |
5 |
1 |
3 |
3 |
5 |
=
2 |
5 |
3 |
5 |
1 |
3 |
=1+
1 |
3 |
=1
1 |
3 |
(6)
5 |
12 |
5 |
9 |
5 |
12 |
=
5 |
12 |
5 |
12 |
5 |
9 |
=
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