问题 解答题
用你喜欢的方法计算下面各题.
0.125×8888-7.5+12-2.5555×9+111×55
7
8
-
5
6
+
7
12
168.1÷(4.3×2-0.4)
3
8
÷
[(
5
6
-
2
3
)×3].
答案

(1)0.125×88,

=0.125×(80+8),

=0.125×80+0.125×8,

=10+1,

=11;

(2)88-7.5+12-2.5,

=(88+12)-(7.5+2.5),

=100-10,

=90;

(3)555×9+111×55,

=(111×5)×9+111×55,

=111×(5×9)+111×55,

=111×(45+55),

=111×100,

=11100;

(4)

7
8
-
5
6
+
7
12

=

21
24
-
20
24
+
14
24

=

5
8

(5)168.1÷(4.3×2-0.4),

=168.1÷(8.6-0.4),

=168.1÷8.2,

=20.5;

(6)

3
8
÷[(
5
6
-
2
3
)×3],

=

3
8
÷[(
5
6
-
4
6
)×3],

=

3
8
÷
1
2

=

3
4

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