问题 解答题
脱式计算,能简算的要简算.
(1)(125+8)×8
(2)25×13×4(3)18.8-4.125-5.875
(4)
3
5
×
11
10
+
2
5
÷
10
11
(5)[1-(
1
2
-
1
4
)]×
2
3
(6)
5
8
-
1
4
×(
8
9
÷
4
3
)
答案

(1)(125+8)×8,

=125×8+8×8,

=1000+64,

=1064;

(2)25×13×4,

=25×4×13,

=100×13,

=1300;

(3)18.8-4.125-5.875,

=18.8-(4.125+5.875),

=18.8-10,

=8.8;

(4)

3
5
×
11
10
+
2
5
÷
10
11

=

3
5
×
11
10
+
2
5
×
11
10

=(

3
5
+
2
5
)×
11
10

=

11
10

(5)[1-(

1
2
-
1
4
)]×
2
3

=[1-

1
4
2
3

=

3
4
×
2
3

=

1
2

(6)

5
8
-
1
4
×(
8
9
÷
4
3
),

=

5
8
-
1
4
×(
8
9
×
3
4
)

=

5
8
-
1
4
×
2
3

=

5
8
-
1
6

=

15
24
-
4
24

=

11
24

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