题目内容
计算下面各题.
(1)10
-(
+3
)
(2)7.2÷4÷0.9
(3)
+8×(
-
)
(4)(
+
)÷
×
.
(1)10
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
(2)7.2÷4÷0.9
(3)
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
(4)(
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 3 |
| 5 |
(1)10
-(
+3
),
=10
-
-3
,
=10-3
,
=6
;
(2)7.2÷4÷0.9,
=7.2÷(4×0.9),
=7.2÷3.6,
=2;
(3)
+8×(
-
),
=
+8×
-8×
,
=
+7-
,
=7
-6
,
=1;
(4)(
+
)÷
×
,
=
÷
×
,
=
×
,
=
.
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
=10
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
=10-3
| 2 |
| 5 |
=6
| 3 |
| 5 |
(2)7.2÷4÷0.9,
=7.2÷(4×0.9),
=7.2÷3.6,
=2;
(3)
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
=
| 2 |
| 3 |
| 7 |
| 8 |
| 5 |
| 6 |
=
| 2 |
| 3 |
| 20 |
| 3 |
=7
| 2 |
| 3 |
| 2 |
| 3 |
=1;
(4)(
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 3 |
| 5 |
=
| 5 |
| 4 |
| 5 |
| 6 |
| 3 |
| 5 |
=
| 3 |
| 2 |
| 3 |
| 5 |
=
| 9 |
| 10 |
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