用递等式计算,能简算的简算: 85×54÷18+745 3.4÷[(1.25+0.45)×23] 35×(1?37)÷512 (15
用递等式计算,能简算的简算:85×54÷18+7453.4÷[(1.25+0.45)×23]35×(1?37)÷512(156×413?26)×81178×1213+78...
用递等式计算,能简算的简算: 85×54÷18+745 3.4÷[(1.25+0.45)×23] 35×(1?37)÷512 (156×413?26)×811 78×1213+78÷13 85.87-(5.87+2.9)
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琴余缘5828
推荐于2016-07-09
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(1)85×54÷18+745,
=85×(54÷18)+745,
=85×3+745,
=255+745,
=1000;
(2)3.4÷[(1.25+0.45)×23],
=3.4÷[1.7×23],
=3.4÷1.7÷23,
=2÷23,
=
;
(3)35×(1-
)÷
,
=35×
×
,
=35×
,
=48;
(4)(156×
-26)×
,
=(48-26)×
,
=22×
,
=16;
(5)
×
+
÷13,
=
×
+
×
,
=(
+)×
,
=
;
(6)85.87-(5.87+2.9),
=85.87-5.87-2.9,
=(85.87-5.87)-2.9,
=80-2.9,
=77.1.
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