脱式计算(能简便计算的要写出简算过程).(1)3.64÷4+4.36×25%(2)3.2×25×12.5(3)34÷[56×(37

2025-02-13 09:02:31
推荐回答(1个)
回答1:

(1)3.64÷4+4.36×25%
=3.46×
1
4
+4.36×
1
4

=(3.46+4.36)×
1
4

=8×
1
4

=2;

(2)3.2×25×12.5,
=0.8×4×25×12.5,
=(4×25)×(12.5×0.8),
=100×10,
=1000;

(3)
3
4
÷[56×(
3
7
?
3
8
)],
=
3
4
÷[56×
3
56
],
=
3
4
÷3,
=
1
4