题目内容
计算下面各题,能简算的要简算.
(1)772-317+128-283 (2)(
-
)÷(2-
)
(3)(
+
+
)×36(4)120÷[45×(1-
)].
(1)772-317+128-283 (2)(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
(3)(
| 1 |
| 4 |
| 1 |
| 6 |
| 5 |
| 12 |
| 8 |
| 9 |
(1)772-317+128-283
=772+128-(317+283)
=900-600
=300;
(2)(
-
)÷(2-
)
=
÷
=
×
=
;
(3)(
+
+
)×36
=
×36+
×36+
×36
=9+6+15
=30;
(4)120÷[45×(1-
)]
=120÷[45×
]
=120÷5
=24.
=772+128-(317+283)
=900-600
=300;
(2)(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 6 |
| 2 |
| 3 |
=
| 1 |
| 9 |
(3)(
| 1 |
| 4 |
| 1 |
| 6 |
| 5 |
| 12 |
=
| 1 |
| 4 |
| 1 |
| 6 |
| 5 |
| 12 |
=9+6+15
=30;
(4)120÷[45×(1-
| 8 |
| 9 |
=120÷[45×
| 1 |
| 9 |
=120÷5
=24.
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