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怎样算简便就怎样算49×34÷91236×34+0.75×63+75%18×(29+13-16)  ...
怎样算简便就怎样算49×34÷91236×34+0.75×63+75%18×(29+13-16)14÷(5-813-513)...
怎样算简便就怎样算49×34÷91236×34+0.75×63+75%18×(29+13-16) 14÷(5-813-513)
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(1)
×
÷
=
÷
=
×
=
;
(2)36×
+0.75×63+75%
=36×0.75+0.75×63+0.75
=(36+63+1)×0.75
=100×0.75
=75;
(3)18×(
+
-
)
=18×
+18×
-18×
=4+6-3
=7;
(4)
÷(5-
-
)
=
÷[5-(
+
)]
=
÷[5-1]
=
÷4
=
.
4 |
9 |
3 |
4 |
9 |
12 |
=
1 |
3 |
9 |
12 |
=
1 |
3 |
12 |
9 |
=
4 |
9 |
(2)36×
3 |
4 |
=36×0.75+0.75×63+0.75
=(36+63+1)×0.75
=100×0.75
=75;
(3)18×(
2 |
9 |
1 |
3 |
1 |
6 |
=18×
2 |
9 |
1 |
3 |
1 |
6 |
=4+6-3
=7;
(4)
1 |
4 |
8 |
13 |
5 |
13 |
=
1 |
4 |
8 |
13 |
5 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
16 |
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