问题
解答题
用递等式计算.
|
答案
(1)2184-[(44×19+44)÷5],
=2184-[44×(19+1)÷5],
=2184-[44×20÷5],
=2184-[880÷5],
=2184-176,
=2008;
(2)450+(8.16+6.84)÷0.63,
=450+15÷0.63,
=450+23
,17 21
=473
;17 21
(3)(
+4 5
)÷1 4
+7 5
,5 6
=
÷21 20
+7 5
,5 6
=
+3 4
,5 6
=
;19 12
(4)[1-(
+1 12
)×2]÷1 8
,1 12
=[1-
×2]÷5 24
,1 12
=[1-
]÷5 12
,1 12
=
÷7 12
,1 12
=7;
(5)(4-7.5×
)÷4 15
,2 9
=(4-2)÷
,2 9
=2÷
,2 9
=9;
(6)
÷[(7 12
+0.875)×1 4
]-8 9
,1 4
=
÷[1.125×7 12
]-8 9
,1 4
=
÷1-7 12
,1 4
=
-7 12
,1 4
=
.1 3