问题 解答题
计算下列各题,能简算的要简算.
①5.25×3.6+5.25×3.4+5.25
②(0.75+0.2)÷0.25×250%
1
8
÷[(
5
8
-
1
3
3
7
]

④13×(
3
29
+
1
13
)×29
答案

①5.25×3.6+5.25×3.4+5.25,

=5.25+(3.6+3.4+1),

=5.25×8,

=42;

②(0.75+0.2)÷0.25×250%,

=0.95÷0.25×2.5,

=3.8×2.5,

=9.5;

1
8
÷[(
5
8
-
1
3
3
7
],

=

1
8
÷[
7
24
×
3
7
],

=

1
8
÷
1
8

=1;

④13×(

3
29
+
1
13
)×29,

=(13×29)×(

3
29
+
1
13
),

=(29×

3
29
×13)+(13×
1
13
×29),

=(3×13)+(1×29),

=39+29,

=68.

单项选择题
单项选择题