问题 解答题
脱式计算,能简算的可简算.
10
13
+
1
5
+
3
13
+
4
5
7
25
+(
5
18
+
18
25
③32×0.25×0.125④0.75+0.125+
1
4
+
7
8
答案

(1)

10
13
+
1
5
+
3
13
+
4
5

=(

10
13
+
3
13
)+(
1
5
+
4
5
),

=1+1,

=2;

(2)

7
25
+(
5
18
+
18
25
),

=

5
18
+(
7
25
+
18
25
),

=

5
18
+1,

=1

5
18

(3)32×0.25×0.125,

=(4×0.25)×(8×0.125),

=1×1,

=1;

(4)0.75+0.125+

1
4
+
7
8

=(0.75+0.25)+(0.125+0.875),

=1+1,

=2.

单项选择题
单项选择题