题目内容
计算下面各题,能简算的要用简便方法算.
| 201-5406÷51 | 1.8×(21÷1.4) | 3-4×2.33×0.25 | |||||||||||||
(
|
|
(1)201-5406÷51,
=201-106,
=95;
(2)1.8×(21÷1.4),
=1.8×15,
=27;
(3)3-4×2.33×0.25,
=3-(4×0.25)×2.33,
=3-1×2.33,
=3-2.33,
=0.67;
(4)(
-
)×(
+
),
=
×
,
=
;
(5)
÷[
-(0.15+
)],
=
÷[
-0.6],
=
÷
,
=7.5.
=201-106,
=95;
(2)1.8×(21÷1.4),
=1.8×15,
=27;
(3)3-4×2.33×0.25,
=3-(4×0.25)×2.33,
=3-1×2.33,
=3-2.33,
=0.67;
(4)(
| 7 |
| 8 |
| 5 |
| 16 |
| 5 |
| 9 |
| 2 |
| 3 |
=
| 9 |
| 16 |
| 11 |
| 9 |
=
| 11 |
| 16 |
(5)
| 7 |
| 4 |
| 5 |
| 6 |
| 9 |
| 20 |
=
| 7 |
| 4 |
| 5 |
| 6 |
=
| 7 |
| 4 |
| 7 |
| 30 |
=7.5.
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