(1)3.58-2.36-(2.64-1.42)
=3.58-2.36-2.64+1.42
=(3.58+1.42)-(2.36+2.64)
=5-5
=0;
(2)(
+1 4
?1 6
)×121 3
=
×12+1 4
×12-1 6
×121 3
=3+2-4
=1;
(3)3.6×
+8.4÷11 8
8 11
=3.6×
+8.4×11 8
11 8
=(3.6+8.4)×
11 8
=12×
11 8
=
;33 2
(4)
÷[3.75×(1.2?3 4
)]1 5
=
÷[3.75×1]3 4
=
÷33 4
3 4
=
.1 5