(1)(
4
11 +
1
17 )×11+
6
17 ,
=
4
11 ×11+
1
17 ×11+
6
17 ,
=4+(
11
17 +
6
17 ),
=4+1,
=5;
(2)(3618÷18-145)×29,
=(201-145)×29,
=56×(30-1),
=1680-56,
=1624.
(3)56×(1-
4
7 )÷
8
11 ,
=56×
3
7 ×
11
8 ,
=33;
(4)3.4-1.8+7.6-2.2,
=(3.4+7.6)-(1.8+2.2),
=11-4,
=7;
(5)4.2×6.8+4.2×2.2+2.1×2,
=4.2×6.8+4.2×2.2+4.2×1,
=(6.8+2.2+1)×4.2,
=10×4.2,
=42;
(6)[(
4
5 -
1
4 )×
6
11 ]÷
9
20 ,
=[
11
20 ×
6
11 ]×
20
9 ,
=
6
20 ×
20
9 ,
=
2
3 .