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递等式计算8.38×234−2.75×71950−27.5%4875÷75-253×32÷128[254−56×(2512−11960+2.275)]÷65%3.3÷(8.98−11.16×23+50%).

题目详情
递等式计算
8.38×2
3
4
−2.75×7
19
50
−27.5%
4875÷75-253×32÷128
[254−56×(2
5
12
−1
19
60
+2.275)]÷65%
3.3÷(8.98−11.16×
2
3
+50%).
▼优质解答
答案和解析
(1)8.38×2
3
4
-2.75×7
19
50
-27.5%,
=(8.38-7.38)×2.75-27.5%,
=2.75-27.5%,
=2.475;

(2)4875÷75-253×32÷128,
=65-8096÷128,
=65-63.25,
=1.75;

(3)[254-56×(2
5
12
-1
19
60
+2.275)]÷65%,
=[254-56×(1.1+2.275)]÷65%,
=[254-56×3.375]÷65%,
=[254-189]÷65%,
=65÷65%,
=100;

(4)3.3÷(8.98-11.16×
2
3
+50%),
=3.3÷(8.98-7.44+50%),
=3.3÷(1.54+50%),
=3.3÷2.04,
=1
21
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