问题 解答题
计算下面各题(能简算的要简算)
①0.25×37+
1
4
+62÷4
②(
3
4
+
5
6
-
11
12
)÷12
③1.21×42-(4.46+
7
50

④3.5÷[1.4×(0.1-0.05)
答案

①0.25×37+

1
4
+62÷4,

=

1
4
×37+
1
4
×1+62×
1
4

=(37+1+62)×

1
4

=100×

1
4

=25;

②(

3
4
+
5
6
-
11
12
)÷12,

=(

19
12
-
11
12
)÷12,

=

8
12
÷12,

=

1
18

③1.21×42-(4.46+

7
50
),

=1.21×42-4.6,

=50.82-4.6,

=46.22;

④3.5÷[1.4×(0.1-0.05)],

=3.5÷[1.4×0.05],

=3.5÷0.07,

=50.

单项选择题
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