题目内容
脱式计算
| 1375+450÷18×25 | [2-(
|
3.45-(4.75-0.55×4) |
(1)1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000;
(2)[2-(
-
)÷
]×
,
=[2-
×
]×
,
=[2-
]×
,
=
×
,
=12;
(3)3.45-(4.75-0.55×4),
=3.45-(4.75-2.2),
=3.45-2.55,
=0.9.
=1375+25×25,
=1375+625,
=2000;
(2)[2-(
| 5 |
| 3 |
| 3 |
| 2 |
| 17 |
| 12 |
| 51 |
| 8 |
=[2-
| 1 |
| 6 |
| 12 |
| 17 |
| 51 |
| 8 |
=[2-
| 2 |
| 17 |
| 51 |
| 8 |
=
| 32 |
| 17 |
| 51 |
| 8 |
=12;
(3)3.45-(4.75-0.55×4),
=3.45-(4.75-2.2),
=3.45-2.55,
=0.9.
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