题目内容
计算.
0.25×[(2.8+4.4)÷1.2]
×
-
÷4
÷[(
+
)×
]
×
+
÷3.
0.25×[(2.8+4.4)÷1.2]
| 14 |
| 15 |
| 1 |
| 4 |
| 2 |
| 15 |
| 3 |
| 5 |
| 7 |
| 9 |
| 1 |
| 3 |
| 3 |
| 2 |
| 3 |
| 7 |
| 1 |
| 3 |
| 4 |
| 7 |
(1)0.25×[(2.8+4.4)÷1.2]
=0.25×[7.2÷1.2]
=0.25×6
=1.5;
(2)
×
-
÷4
=
×
-
×
=(
-
)×
=
×
=
;
(3)
÷[(
+
)×
]
=
÷[
×
]
=
×
=
;
(4)
×
+
÷3
=
×
+
×
=(
+
)×
=
.
=0.25×[7.2÷1.2]
=0.25×6
=1.5;
(2)
| 14 |
| 15 |
| 1 |
| 4 |
| 2 |
| 15 |
=
| 14 |
| 15 |
| 1 |
| 4 |
| 2 |
| 15 |
| 1 |
| 4 |
=(
| 14 |
| 15 |
| 2 |
| 15 |
| 1 |
| 4 |
=
| 12 |
| 15 |
| 1 |
| 4 |
=
| 1 |
| 5 |
(3)
| 3 |
| 5 |
| 7 |
| 9 |
| 1 |
| 3 |
| 3 |
| 2 |
=
| 3 |
| 5 |
| 10 |
| 9 |
| 3 |
| 2 |
=
| 3 |
| 5 |
| 3 |
| 5 |
=
| 9 |
| 25 |
(4)
| 3 |
| 7 |
| 1 |
| 3 |
| 4 |
| 7 |
=
| 3 |
| 7 |
| 1 |
| 3 |
| 4 |
| 7 |
| 1 |
| 3 |
=(
| 3 |
| 7 |
| 4 |
| 7 |
| 1 |
| 3 |
=
| 1 |
| 3 |
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