问题 解答题
灵活计算下面各题
(1)54.75-5.25-14.75

(2)16.4÷(4.3×2-0.4)
(3)1.25×32(4)
2
3
×[1-(
1
2
-
1
4
)].
答案

(1)54.75-5.25-14.75,

=54.75-(14.75+5.25),

=54.75-20,

=34.75;

(2)16.4÷(4.3×2-0.4),

=16.4÷(8.6-0.4),

=16.4÷8.2,

=2;

(3)1.25×32,

=(1.25×8)×4,

=10×4,

=40;

(4)

2
3
×[1-(
1
2
-
1
4
)],

=

2
3
×[1-
1
4
],

=

2
3
×
3
4

=

1
2

单项选择题
单项选择题