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直接写得数．2.8÷0.4=38+38=0.21×0.3=811-511=0.42÷0.6=1.25×0.8=1-512=9x-x=35-12=a×a×3=1-38-18=14-0.25=27+15=13+14-13=1-35+25=

题目详情
直接写得数．
2.8÷0.4=
3
8
+
3
8
=		0.21×0.3=
8
11
-
5
11
=
0.42÷0.6=1.25×0.8=1-
5
12
=		9x-x=
3
5
-
1
2
=		a×a×3=1-
3
8
-
1
8
=
1
4
-0.25=
2
7
+
1
5
=
1
3
+
1
4
-
1
3
=		1-
3
5
+
2
5
=
直接写得数．
2.8÷0.4=
3
8
+
3
8
=		0.21×0.3=
8
11
-
5
11
=
0.42÷0.6=1.25×0.8=1-
5
12
=		9x-x=
3
5
-
1
2
=		a×a×3=1-
3
8
-
1
8
=
1
4
-0.25=
2
7
+
1
5
=
1
3
+
1
4
-
1
3
=		1-
3
5
+
2
5
=

2.8÷0.4=
3
8
+
3
8
=		0.21×0.3=
8
11
-
5
11
=
0.42÷0.6=1.25×0.8=1-
5
12
=		9x-x=
3
5
-
1
2
=		a×a×3=1-
3
8
-
1
8
=
1
4
-0.25=
2
7
+
1
5
=
1
3
+
1
4
-
1
3
=		1-
3
5
+
2
5
=
2.8÷0.4=
3
8
+
3
8
=0.21×0.3=
8
11
-
5
11
=0.42÷0.6=1.25×0.8=1-
5
12
=9x-x=
3
5
-
1
2
=a×a×3=1-
3
8
-
1
8
=
1
4
-0.25=
2
7
+
1
5
=
1
3
+
1
4
-
1
3
=1-
3
5
+
2
5
=2.8÷0.4=
3
8
+
3
8
=0.21×0.3=
8
11
-
5
11
=2.8÷0.4=
3
8
+
3
8
=
3
8
+
3
8
=
3
8
383388
3
8
=
3
8
3833880.21×0.3=
8
11
-
5
11
=
8
11
-
5
11
=
8
11
811881111
5
11
=
5
11
5115511110.42÷0.6=1.25×0.8=1-
5
12
=9x-x=0.42÷0.6=1.25×0.8=1-
5
12
=
5
12
=
5
12
5125512129x-x=
3
5
-
1
2
=a×a×3=1-
3
8
-
1
8
=
1
4
-0.25=
3
5
-
1
2
=
3
5
-
1
2
=
3
5
353355
1
2
=
1
2
121122a×a×3=1-
3
8
-
1
8
=
3
8
-
1
8
=
3
8
383388
1
8
=
1
8
181188
1
4
-0.25=
1
4
-0.25=
1
4
141144
2
7
+
1
5
=
1
3
+
1
4
-
1
3
=1-
3
5
+
2
5
=
2
7
+
1
5
=
2
7
+
1
5
=
2
7
272277
1
5
=
1
5
151155
1
3
+
1
4
-
1
3
=
1
3
+
1
4
-
1
3
=
1
3
131133
1
4
141144
1
3
1311331-
3
5
+
2
5
=
3
5
+
2
5
=
3
5
353355
2
5
252255
▼优质解答
答案和解析
2.8÷0.4=7
3
8
+
3
8
=
3
4
0.21×0.3=0.063
8
11
-
5
11
=
3
11
0.42÷0.6=0.71.25×0.8=11-
5
12
=
7
12
9x-x=8x
3
5
-
1
2
=
1
10
a×a×3=3a21-
3
8
-
1
8
=
1
2
1
4
-0.25=0
2
7
+
1
5
=
17
35
1
3
+
1
4
-
1
3
=
1
4
1-
3
5
+
2
5
=
4
5
2.8÷0.4=7
3
8
+
3
8
=
3
4
0.21×0.3=0.063
8
11
-
5
11
=
3
11
0.42÷0.6=0.71.25×0.8=11-
5
12
=
7
12
9x-x=8x
3
5
-
1
2
=
1
10
a×a×3=3a21-
3
8
-
1
8
=
1
2
1
4
-0.25=0
2
7
+
1
5
=
17
35
1
3
+
1
4
-
1
3
=
1
4
1-
3
5
+
2
5
=
4
5
2.8÷0.4=7
3
8
+
3
8
=
3
4
0.21×0.3=0.063
8
11
-
5
11
=
3
11
2.8÷0.4=72.8÷0.4=7
3
8
+
3
8
=
3
4
3
8
+
3
8
=
3
4
3
8
38333888+
3
8
=
3
4
3
8
38333888=
3
4
3
4
343334440.21×0.3=0.0630.21×0.3=0.063
8
11
-
5
11
=
3
11
8
11
-
5
11
=
3
11
8
11
811888111111-
5
11
=
3
11
5
11
511555111111=
3
11
3
11
3113331111110.42÷0.6=0.71.25×0.8=11-
5
12
=
7
12
9x-x=8x0.42÷0.6=0.70.42÷0.6=0.71.25×0.8=11.25×0.8=11-
5
12
=
7
12
1-
5
12
=
7
12
5
12
512555121212=
7
12
7
12
7127771212129x-x=8x9x-x=8x
3
5
-
1
2
=
1
10
a×a×3=3a21-
3
8
-
1
8
=
1
2
1
4
-0.25=0
3
5
-
1
2
=
1
10
3
5
-
1
2
=
1
10
3
5
35333555-
1
2
=
1
10
1
2
12111222=
1
10
1
10
110111101010a×a×3=3a2a×a×3=3a221-
3
8
-
1
8
=
1
2
1-
3
8
-
1
8
=
1
2
3
8
38333888-
1
8
=
1
2
1
8
18111888=
1
2
1
2
12111222
1
4
-0.25=0
1
4
-0.25=0
1
4
14111444-0.25=0
2
7
+
1
5
=
17
35
1
3
+
1
4
-
1
3
=
1
4
1-
3
5
+
2
5
=
4
5
2
7
+
1
5
=
17
35
2
7
+
1
5
=
17
35
2
7
27222777+
1
5
=
17
35
1
5
15111555=
17
35
17
35
1735171717353535
1
3
+
1
4
-
1
3
=
1
4
1
3
+
1
4
-
1
3
=
1
4
1
3
13111333+
1
4
14111444-
1
3
13111333=
1
4
1
4
141114441-
3
5
+
2
5
=
4
5
1-
3
5
+
2
5
=
4
5
3
5
35333555+
2
5
25222555=
4
5
4
5
45444555
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