56+37-80+16= 31.5+5= 12-1.1= 1.2×0.2=
2.87÷0.7=
4
5
=
1
6
+
5
6
=
7
15
-
1
15
=
4
15
÷
2
5
=
3
8
×
4
5
=
30÷50=
7
8
=
25×8=
1
4
+
1
5
=
12×
2
3
=
分析:根據(jù)整數(shù)、分?jǐn)?shù)、小數(shù)的四則混合運算進(jìn)行計算即可.
解答:
解:56+37-80+16=29 31.5+5=36.5 12-1.1=10.9 1.2×0.2=0.24
2.87÷0.7=4.1
4
5
=1
1
4
1
6
+
5
6
=1
7
15
-
1
15
=
2
5
4
15
÷
2
5
=
2
3
3
8
×
4
5
=0.3
30÷50=0.6
7
8
=0
25×8=200
1
4
+
1
5
=
9
20
12×
2
3
=8
故答案為:-3,36.5,10.9,0.24,4.1,1
1
4
,1,
2
5
,
2
3
,0.3,0.6,0,200,
9
20
,8.
點評:此題主要考查的是整數(shù)、分?jǐn)?shù)和小數(shù)的四則混合運算.
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