题目内容
简便计算
| 4×0.27×25 | 3.8×99+3.8 | (8+
|
|
(1)4×0.27×25,
=(4×25)×0.27,
=100×0.27,
=27;
(2)3.8×99+3.8,
=3.8×(99+1),
=3.8×100,
=380;
(3)(8+
)÷4,
=(8+
)×
,
=8×
+
×
,
=2+
,
=2
;
(4)
-
-
,
=
-(
+
),
=
-1,
=
.
=(4×25)×0.27,
=100×0.27,
=27;
(2)3.8×99+3.8,
=3.8×(99+1),
=3.8×100,
=380;
(3)(8+
| 4 |
| 9 |
=(8+
| 4 |
| 9 |
| 1 |
| 4 |
=8×
| 1 |
| 4 |
| 4 |
| 9 |
| 1 |
| 4 |
=2+
| 1 |
| 9 |
=2
| 1 |
| 9 |
(4)
| 9 |
| 7 |
| 4 |
| 5 |
| 1 |
| 5 |
=
| 9 |
| 7 |
| 4 |
| 5 |
| 1 |
| 5 |
=
| 9 |
| 7 |
=
| 2 |
| 7 |
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