问题
解答题
脱式计算.
|
答案
(1)2220-36×42÷27,
=2220-1512÷27,
=2220-56,
=2164;
(2)[(1
+21 2
)÷22 3
-1 2
]×45 6
,4 5
=[
÷225 6
-1 2
]×45 6
,4 5
=[
-5 3
]×45 6
,4 5
=
×5 6
,24 5
=4;
(3)(25%+
)×(3 8
÷3 7
÷3 7
),5 8
=
×(1÷5 8
),5 8
=
×5 8
,8 5
=1.