题目内容
下面各题,怎样算简便就怎样算.
| 1485+290÷58×16 | 34.25-1.72-2 | (2.8+3.85÷3.5)×4.6 | ||||||||||||||||
24×
| (
| 30÷[(
|
(1)1485+290÷58×16,
=1485+5×16,
=1485+80,
=1565;
(2)34.25-1.72-2,
=32.53-2,
=30.53;
(3)(2.8+3.85÷3.5)×4.6,
=(2.8+1.1)×4.6,
=3.9×4.6,
=17.94;
(4)24×
+76÷5,
=24×
+76×
,
=(24+76)×
,
=100×
,
=20;
(5)(
-
)÷(
+
),
=
÷
,
=
×
,
=
;
(6)30÷[(
+
)×
]
=30÷[
×
],
=30÷
,
=160.
=1485+5×16,
=1485+80,
=1565;
(2)34.25-1.72-2,
=32.53-2,
=30.53;
(3)(2.8+3.85÷3.5)×4.6,
=(2.8+1.1)×4.6,
=3.9×4.6,
=17.94;
(4)24×
| 1 |
| 5 |
=24×
| 1 |
| 5 |
| 1 |
| 5 |
=(24+76)×
| 1 |
| 5 |
=100×
| 1 |
| 5 |
=20;
(5)(
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 8 |
| 5 |
| 12 |
=
| 4 |
| 15 |
| 13 |
| 24 |
=
| 4 |
| 15 |
| 24 |
| 13 |
=
| 32 |
| 65 |
(6)30÷[(
| 1 |
| 4 |
| 2 |
| 7 |
| 7 |
| 20 |
=30÷[
| 15 |
| 28 |
| 7 |
| 20 |
=30÷
| 3 |
| 16 |
=160.
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