问题 解答题
能简算的要简算:
1
4
×3
1
4
+0.25×6
3
4
95.6×27-17×95
3
5
1.21×42-(4.46+
7
50
)
1+45%÷0.9-
7
8
(1-
3
4
×
2
5
)÷(
1
4
+
3
8
)
答案

(1)

1
4
×3
1
4
+0.25×6
3
4

=

1
4
×(3
1
4
+6
3
4
),

=

1
4
×10,

=

5
2

(2)95.6×27-17×95

3
5

=95.6×(27-17),

=95.6×10,

=956;

(3)1.21×42-(4.46+

7
50
),

=1.21×42-4.6,

=47.04-4.6,

=42.44;

(4)1+45%÷0.9-

7
8

=1+0.5-0.875,

=1.5-0.875,

=0.625;

(5)(1-

3
4
×
2
5
)÷(
1
4
+
3
8
),

=(1-

3
10
)÷
5
8

=

7
10
×
8
5

=

28
25

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