问题 解答题
用递等式计算.
3
4
÷
5
6
-
7
12
×
4
35

②7.2÷[(3.01-2.86)×0.24]
③346×25÷17÷
1
34

④1.25×63×32÷9.
答案

3
4
÷
5
6
-
7
12
×
4
35

=

9
10
-
1
15

=

5
6

②7.2÷[(3.01-2.86)×0.24],

=7.2÷[0.15×0.24],

=7.2÷0.036,

=200;

③346×25÷17÷

1
34

=346×25×

1
17
×34,

=(346×25)×(

1
17
×34)

=8650×2,

=17300;

④1.25×63×32÷9,

=(1.25×32)×(63÷9),

=(1.25×8×4)×7,

=(10×4)×7,

=40×7,

=280.

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