题目内容

用你喜欢的方法计算下面各题.
0.125×88 88-7.5+12-2.5 555×9+111×55
7
8
-
5
6
+
7
12
168.1÷(4.3×2-0.4)
3
8
÷
[(
5
6
-
2
3
)×3].
(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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