题目内容
用你喜欢的方法计算.
|
| ||||||||||||
(
| 19÷[(
|
(1)
×
+
÷
=
×
+
×
=
×(
+
)
=
×1
=
;
(2)
×97+
×3
=
×(97+3)
=
×100
=75;
(3)(
-
)÷
=(
-
)×54
=
×54-
×54
=3-1
=2;
(4)19÷[(
+
)×
]
=19÷[
×
]
=19÷
=24.
| 2 |
| 5 |
| 1 |
| 3 |
| 2 |
| 3 |
| 5 |
| 2 |
=
| 2 |
| 5 |
| 1 |
| 3 |
| 2 |
| 3 |
| 2 |
| 5 |
=
| 2 |
| 5 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 2 |
| 5 |
=
| 2 |
| 5 |
(2)
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=75;
(3)(
| 1 |
| 18 |
| 1 |
| 54 |
| 1 |
| 54 |
=(
| 1 |
| 18 |
| 1 |
| 54 |
=
| 1 |
| 18 |
| 1 |
| 54 |
=3-1
=2;
(4)19÷[(
| 1 |
| 5 |
| 3 |
| 4 |
| 5 |
| 6 |
=19÷[
| 19 |
| 20 |
| 5 |
| 6 |
=19÷
| 19 |
| 24 |
=24.
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