解答:11解:(1)13.92-(1.19+9.92)-2.81,
=13.92-1.19-9.92-2.81,
=(13.92-9.92)-(1.19+2.81),
=4-4,
=0;
(2)(
+2 5
-1 6
)×30,2 15
=
×30+2 5
×30-1 6
×30,2 15
=12+5-4,
=13;
(3)55×66÷(11×11),
=55×66÷11÷11,
=(55÷11)×(66÷11),
=5×6,
=30;
(4)40.2-4÷80×2.4,
=40.2-0.05×2.4,
=40.2-0.12,
=40.08;
(5)
×[1 8
÷(1 2
×3 5
)],10 9
=
×[1 8
÷1 2
],2 3
=
×1 8
,3 4
=
;3 32
(6)
×2002,2000 2001
=
×(2001+1),2000 2001
=
×2001+2000 2001
×1,2000 2001
=2000+
,2000 2001
=2000
.2000 2001