题目内容

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.
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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