题目内容

(1)
1
8
×5.3+0.125×5.7-1÷8

(2)(8.8-3
5
11
-2
6
11
)×1
9
14

(3)46×
17
45

(1)
1
8
×5.3+0.125×5.7-1÷8

=0.125×5.3+0.125×5.7-0.125,
=0.125×(5.3+5.7-1),
=0.125×10,
=1.25;

(2)(8.8-3
5
11
-2
6
11
)×1
9
14

=[8.8-(3
5
11
+2
6
11
)]×1
9
14

=[8.8-6]×1
9
14

=2.8×1
9
14

=4.6;

(3)46×
17
45

=(45+1)×
17
45

=45×
17
45
+1×
17
45

=17+
17
45

=17
17
45
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