题目内容
计算
(1)1.3×
-
×0.25+0.2÷4
(2)[(1
-
)×75%+
]÷
(3)[14.8+(6
-4.5)×1
]÷2
(4)
+
+
+
+
+
.
(1)1.3×
| 1 |
| 4 |
| 1 |
| 2 |
(2)[(1
| 1 |
| 3 |
| 8 |
| 15 |
| 1 |
| 4 |
| 17 |
| 20 |
(3)[14.8+(6
| 2 |
| 7 |
| 3 |
| 25 |
| 2 |
| 3 |
(4)
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
(1)1.3×
-
×0.25+0.2÷4,
=1.3×
-0.5×
+0.2×
,
=(1.3-0.5+0.2)×
,
=1×
,
=
;
(2)[(1
-
)×75%+
]÷
,
=[(
-
)×
+
]÷
,
=[
×
+
]÷
,
=[
+
]÷
,
=
÷
,
=1;
(3)[14.8+(6
-4.5)×1
]÷2
,
=[14.8+(
-
)×
]÷2
,
=[14.8+
×
]÷2
,
=[14.8+2]÷2
,
=16
÷2
,
=
×
,
=
;
(4)
+
+
+
+
+
,
=(1-
)+(
-
)+(
-
)+(
-
)+(
-
)+(
-
),
=1-
+
-
+
-
+
-
+
-
+
-
,
=1-
,
=
.
| 1 |
| 4 |
| 1 |
| 2 |
=1.3×
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=(1.3-0.5+0.2)×
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(2)[(1
| 1 |
| 3 |
| 8 |
| 15 |
| 1 |
| 4 |
| 17 |
| 20 |
=[(
| 4 |
| 3 |
| 8 |
| 15 |
| 3 |
| 4 |
| 1 |
| 4 |
| 17 |
| 20 |
=[
| 4 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
| 17 |
| 20 |
=[
| 3 |
| 5 |
| 1 |
| 4 |
| 17 |
| 20 |
=
| 17 |
| 20 |
| 17 |
| 20 |
=1;
(3)[14.8+(6
| 2 |
| 7 |
| 3 |
| 25 |
| 2 |
| 3 |
=[14.8+(
| 44 |
| 7 |
| 9 |
| 2 |
| 28 |
| 25 |
| 2 |
| 3 |
=[14.8+
| 25 |
| 14 |
| 28 |
| 25 |
| 2 |
| 3 |
=[14.8+2]÷2
| 2 |
| 3 |
=16
| 4 |
| 5 |
| 2 |
| 3 |
=
| 84 |
| 5 |
| 3 |
| 8 |
=
| 63 |
| 10 |
(4)
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
=(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
=1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
=1-
| 1 |
| 7 |
=
| 6 |
| 7 |
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