问题
解答题
脱式计算. 2÷
1-
(2.25×4.8+77.5×0.48 [1-(
|
答案
(1)2÷
×8 5 25 24
=
×5 4 25 24
=1
;29 96
(2)1-
÷5 14 5 7
=1-1 2
=
;1 2
(3)2.25×4.8+77.5×0.48
=(2.25+7.75)×4.8
=10×4.8
=48;
(4)[1-(
-1 2
)]×361 3
=[1-
]×361 6
=
×355 6
=30.