怎样简便怎样算.56×725×625×314×23(37+12)×1458×58+58×38100×299514×725×58×23.-数学
=
2 |
5 |
1 |
7 |
=
2 |
35 |
(3)(
3 |
7 |
1 |
2 |
=
3 |
7 |
1 |
2 |
=6+7,
=13;
(4)
5 |
8 |
5 |
8 |
5 |
8 |
3 |
8 |
=
5 |
8 |
5 |
8 |
3 |
8 |
=
5 |
8 |
=
5 |
8 |
(5)100×
2 |
99 |
=(99+1)×
2 |
99 |
=99×
2 |
99 |
2 |
99 |
=2+
2 |
99 |
=2
2 |
99 |
(6)
5 |
14 |
7 |
25 |
5 |
8 |
2 |
3 |
=(
5 |
14 |
7 |
25 |
5 |
8 |
2 |
3 |
=
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