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用简便方法计算.125×88=14.32-7.8+1.68-3.2=0.9×99+0.9=29÷116+29×511=

题目详情
用简便方法计算.
125×88=
14.32-7.8+1.68-3.2=
0.9×99+0.9=
2
9
÷
11
6
+
2
9
×
5
11
=
▼优质解答
答案和解析
(1)125×88,
=125×8×11,
=1000×11,
=11000;
(2)14.32-7.8+1.68-3.2,
=14.32+1.68-(7.8+3.2),
=16-11,
=5;
(3)0.9×99+0.9,
=0.9×(99+1),
=0.9×100,
=90;
(4)
2
9
÷
11
6
+
2
9
×
5
11

=
2
9
×
6
11
+
2
9
×
5
11

=
2
9
×(
6
11
+
5
11
),
=
2
9
×1,
=
2
9