题目内容

脱式计算.(能简算的要简算)
0.375×1
3
4
+
5
8
×1.75
1
4
+
5
6
+
2
3
)×12
1
1
5
×12.5×8
3.14÷5+3.14×
4
5
7
20
+(9
1
4
-7
3
5
)÷2
3
4
4
1
5
-1.65-1.35.
(1)0.375×1
3
4
+
5
8
×1.75,
=
3
8
×1
3
4
+
5
8
×1
3
4

=(
3
8
+
5
8
)×1
3
4

=1×1
3
4

=1
3
4


(2)(
1
4
+
5
6
+
2
3
)×12,
=
1
4
×12+
5
6
×12+
2
3
×12,
=3+10+8,
=21.

(3)1
1
5
×12.5×8,
=
6
5
×(12.5×8),
=
6
5
×100,
=120.

(4)3.14÷5+3.14×
4
5

=3.14×
1
5
+3.14×
4
5

=3.14×(
1
5
+
4
5
),
=3.14×1,
=3.14.

(5)
7
20
+(9
1
4
-7
3
5
)÷2
3
4

=
7
20
+(
37
4
-
38
5
)÷
11
4

=
7
20
+(
185
20
-
152
20
)÷
11
4

=
7
20
+
33
20
×
4
11

=
7
20
+
12
20

=
19
20


(6)4
1
5
-1.65-1.35,
=4
1
5
-(1.65+1.35),
=4
1
5
-3,
=1
1
5
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