题目内容
计算下面各题,怎样简便就怎样算
+
+
+
36×(
+
-
)
3.4×2.77+0.23×3.4
[1-(
+
)]÷
.
| 7 |
| 9 |
| 3 |
| 8 |
| 5 |
| 8 |
| 2 |
| 9 |
36×(
| 3 |
| 4 |
| 1 |
| 6 |
| 2 |
| 9 |
3.4×2.77+0.23×3.4
[1-(
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 3 |
(1)
+
+
+
,
=(
+
)+(
+
),
=1+1,
=2;
(2)36×(
+
-
),
=36×
+36×
-36×
,
=27+6-8,
=25;
(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;
(4)[1-(
+
)]÷
,
=[1-
]÷
,
=
÷
,
=1.
| 7 |
| 9 |
| 3 |
| 8 |
| 5 |
| 8 |
| 2 |
| 9 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 3 |
| 8 |
| 5 |
| 8 |
=1+1,
=2;
(2)36×(
| 3 |
| 4 |
| 1 |
| 6 |
| 2 |
| 9 |
=36×
| 3 |
| 4 |
| 1 |
| 6 |
| 2 |
| 9 |
=27+6-8,
=25;
(3)3.4×2.77+0.23×3.4,
=3.4×(2.77+0.23),
=3.4×3,
=10.2;
(4)[1-(
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 3 |
=[1-
| 2 |
| 3 |
| 1 |
| 3 |
=
| 1 |
| 3 |
| 1 |
| 3 |
=1.
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