问题
解答题
用递等式计算. (1)1357+450÷18×25 (2)13.7-26.4÷(2.6+1.4) (3)3.6×[2÷(
(4)4-[1-(
|
答案
(1)1357+450÷18×25,
=1357+25×25,
=1357+625,
=1982;
(2)13.7-26.4÷(2.6+1.4),
=13.7-26.4÷4,
=13.7-6.6,
=7.1;
(3)3.6×[2÷(
-0.6)],4 5
=3.6×[2÷0.2],
=3.6×10,
=36;
(4)4-[1-(
+3 5
)]÷1 4
,3 17
=4-[1-
]÷17 20
,3 17
=4-
÷3 20
,3 17
=4-
,17 20
=3
.3 20