题目内容
脱式计算题:
(1)1.625×2005+2005×
-2005
(2)400-14
-85
.
(1)1.625×2005+2005×
| 3 |
| 8 |
(2)400-14
| 13 |
| 27 |
| 14 |
| 27 |
(1)1.625×2005+2005×
-2005,
=2005×(1.625+0.375-1),
=2005×(2-1),
=2005×1,
=2005;
(2)400-14
-85
.
=400-(14
+85
),
=400-100,
=300.
| 3 |
| 8 |
=2005×(1.625+0.375-1),
=2005×(2-1),
=2005×1,
=2005;
(2)400-14
| 13 |
| 27 |
| 14 |
| 27 |
=400-(14
| 13 |
| 27 |
| 14 |
| 27 |
=400-100,
=300.
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