问题 解答题
计算下面各题.(能简算的要简算)
4.38-1.56+0.62-0.441375+450÷18×2518-(
1
15
+
1
21
)×105
36×0.25+65×
1
4
-1÷4.
答案

(1)4.38-1.56+0.62-0.44,

=(4.38+0.62)-(1.56+0.44),

=5-2,

=3;

(2)1375+450÷18×25,

=1375+25×25,

=1375+625,

=2000;

(3)18-(

1
15
+
1
21
)×105,

=18-(

1
15
×105+
1
21
×105),

=18-(7+5),

=18-12,

=6;

(4)36×0.25+65×

1
4
-1÷4,

=36×0.25+65×0.25-1×0.25,

=(36+65-1)×0.25,

=100×0.25,

=25.

问答题
单项选择题