题目内容
计算下面各题,能简算的要简算.
(1)
÷7÷
(2)
×
+
÷7
(3)4×
÷
(4)(0.8-
)÷(
+
)
(5)
÷(
-
)
(6)(
+
)÷
.
(1)
| 5 |
| 12 |
| 5 |
| 7 |
(2)
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
(3)4×
| 5 |
| 12 |
| 5 |
| 9 |
(4)(0.8-
| 2 |
| 5 |
| 2 |
| 9 |
| 1 |
| 3 |
(5)
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 6 |
(6)(
| 7 |
| 12 |
| 11 |
| 18 |
| 5 |
| 36 |
(1)
÷7÷
,
=
÷(7×
),
=
÷5,
=
;
(2)
×
+
÷7,
=(
+
)×
,
=
×
,
=
;
(3)4×
÷
,
=4×(
×
),
=4×
,
=4;
(4)(0.8-
)÷(
+
),
=0.4÷
,
=
;
(5)
÷(
-
),
=
÷
,
=1
;
(6)(
+
)÷
,
=
×
+
×
,
=
+
,
=8
.
| 5 |
| 12 |
| 5 |
| 7 |
=
| 5 |
| 12 |
| 5 |
| 7 |
=
| 5 |
| 12 |
=
| 1 |
| 12 |
(2)
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=(
| 8 |
| 13 |
| 6 |
| 13 |
| 1 |
| 7 |
=
| 14 |
| 13 |
| 1 |
| 7 |
=
| 2 |
| 13 |
(3)4×
| 5 |
| 12 |
| 5 |
| 9 |
=4×(
| 5 |
| 12 |
| 9 |
| 5 |
=4×
| 3 |
| 4 |
=4;
(4)(0.8-
| 2 |
| 5 |
| 2 |
| 9 |
| 1 |
| 3 |
=0.4÷
| 5 |
| 9 |
=
| 18 |
| 25 |
(5)
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 6 |
=
| 2 |
| 3 |
| 1 |
| 2 |
=1
| 1 |
| 3 |
(6)(
| 7 |
| 12 |
| 11 |
| 18 |
| 5 |
| 36 |
=
| 7 |
| 12 |
| 36 |
| 5 |
| 11 |
| 18 |
| 36 |
| 5 |
=
| 21 |
| 5 |
| 22 |
| 5 |
=8
| 3 |
| 5 |
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