题目内容

能简算的要简算
2.9÷8+1.1×
1
8

13
5
×8×
8
13
×1.25
1
4
+
5
7
)×28
3
4
÷3-
1
10
)×
1
3
(1)2.9÷8+1.1×
1
8

=(2.9+1.1)×
1
8

=4×
1
8

=
1
2


(2)
13
5
×8×
8
13
×1.25,
=(
13
5
×
8
13
)×(8×1.25),
=1.6×10,
=16;

(3)(
1
4
+
5
7
)×28,
=
1
4
×
28+
5
7
×
28,
=7+20,
=27;

(4)(
3
4
÷3-
1
10
)×
1
3

=(
3
4
×
1
3
-
1
10
)×
1
3

=
3
20
×
1
3

=
1
20
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