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直接写数对又快.5.7+11.8+4.3=259-56+49=(16+18)×24=4.9×81=10.1×99-9.9=4511-(511+0.5)=149149:17=1732-0.22=

题目详情
直接写数对又快.
5.7+11.8+4.3=
2
5
9
-
5
6
+
4
9
=
1
6
+
1
8
)×24=
4.9×81=
10.1×99-9.9= 4
5
11
-(
5
11
+0.5)=
1
49
1
49
1
7
=
1
7
32-0.22=
直接写数对又快.
5.7+11.8+4.3=
2
5
9
-
5
6
+
4
9
=
1
6
+
1
8
)×24=
4.9×81=
10.1×99-9.9= 4
5
11
-(
5
11
+0.5)=
1
49
1
49
1
7
=
1
7
32-0.22=
直接写数对又快.
5.7+11.8+4.3= 2
5
9
-
5
6
+
4
9
=
1
6
+
1
8
)×24=
4.9×81=直接写数对又快.
5.7+11.8+4.3=
2
5
9
-
5
6
+
4
9
=
5
9
-
5
6
+
4
9
=
5
9
5599
5
6
+
4
9
=
5
6
5566
4
9
=
4
9
4499(
1
6
+
1
8
)×24=
1
6
+
1
8
)×24=
1
6
1166
1
8
)×24=
1
8
11884.9×81= 10.1×99-9.9= 4
5
11
-(
5
11
+0.5)=
1
49
1
49
1
7
=
1
7
32-0.22=10.1×99-9.9=4
5
11
-(
5
11
+0.5)=
5
11
-(
5
11
+0.5)=
5
11
551111
5
11
+0.5)=
5
11
551111
1
49
1
49
1
7
=
1
7
1
49
1
49
1
49
114949
1
49
1
49
1
49
114949
1
7
=
1
7
1
7
1177
1
7
1
7
117732-0.22=22
▼优质解答
答案和解析
5.7+11.8+4.3=21.8 259-56+49=216 (16+18)×24=7 4.9×81=396.9 10.1×99-9.9=990 4511-(511+0.5)=3.5 149:17=17 32-0.22=8.96故答案为:21.8,216,7,396.9,990,3.5,149,8.96....