题目内容
怎样简便就怎样算. 36×(
|
| 1.25+(
|
(1)36×(
+
+
),
=36×
+36×
+36×
,
=18+12+9,
=39;
(2)
×[0.75-(
+0.25)],
=
×[0.75-
-0.25],
=
×[0.75-0.25-
],
=
×[0.5-0.5],
=
×0,
=0;
(3)1.25+(
-
)×12,
=1.25+(
×12-
×12),
=1.25+(10-3),
=1.25+7,
=8.25.
1 |
2 |
1 |
3 |
1 |
4 |
=36×
1 |
2 |
1 |
3 |
1 |
4 |
=18+12+9,
=39;
(2)
5 |
7 |
1 |
2 |
=
5 |
7 |
1 |
2 |
=
5 |
7 |
1 |
2 |
=
5 |
7 |
=
5 |
7 |
=0;
(3)1.25+(
5 |
6 |
1 |
4 |
=1.25+(
5 |
6 |
1 |
4 |
=1.25+(10-3),
=1.25+7,
=8.25.
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