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 24×15+7
下面各题,怎样算简便就怎样算.1485+290÷58×1634.25-1.72-2(2.8+3.85÷3.5)×4.624×15+76÷5(23?25)÷(18+512)...
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 24×15+76÷5 (23?25)÷(18+512) 30÷[(14+27)×720].
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东子qEc
推荐于2016-09-18
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(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.
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