1 化简下面各比。
2.1:0.9=
$\frac{1}{5}:\frac{19}{40}=$
0.54:0.9=
2.4:2.7=
$\frac{3}{4}:\frac{1}{12}=$
$\frac{9}{8}:3=$
45:15=
0.15:0.3=
$\frac{1}{20}:\frac{2}{5}=$
2.5:$\frac{13}{2}=$
$\frac{2}{5}:\frac{2}{7}=$
12:48=
$\frac{3}{5}:\frac{4}{5}=$
0.25:2=
2.1:4.2=
77:63=
0.36:1.2=
$\frac{3}{4}:\frac{9}{10}=$
2.1:0.9=
$\frac{1}{5}:\frac{19}{40}=$
0.54:0.9=
2.4:2.7=
$\frac{3}{4}:\frac{1}{12}=$
$\frac{9}{8}:3=$
45:15=
0.15:0.3=
$\frac{1}{20}:\frac{2}{5}=$
2.5:$\frac{13}{2}=$
$\frac{2}{5}:\frac{2}{7}=$
12:48=
$\frac{3}{5}:\frac{4}{5}=$
0.25:2=
2.1:4.2=
77:63=
0.36:1.2=
$\frac{3}{4}:\frac{9}{10}=$
答案:
7:3
8:19
3:5
8:9
9:1
3:8
3:1
1:2
1:8
5:13
7:5
1:4
3:4
1:8
1:2
11:9
3:10
5:6
8:19
3:5
8:9
9:1
3:8
3:1
1:2
1:8
5:13
7:5
1:4
3:4
1:8
1:2
11:9
3:10
5:6
2 填一填。
12:75=4:( )
7:9=21:( )
5:3=15:( )
3:4=( ) :12
0.3:0.9=( ) :3
2:8=( ) :4
0.3:0.4=( ) :0.8
( ):10=6:5
12:3=( ) :1
5:6=( ) :12
2:( )=3:6
7:6=( ) :18
1:5=( ) :15
7:( )=1:3
( ):6=2:4
3:0.6=( ) :1
12:4=( ) :2
4:11=( ) :33
9:5=45:( )
3:7=( ) :49
15:6=( ) :30
12:75=4:( )
7:9=21:( )
5:3=15:( )
3:4=( ) :12
0.3:0.9=( ) :3
2:8=( ) :4
0.3:0.4=( ) :0.8
( ):10=6:5
12:3=( ) :1
5:6=( ) :12
2:( )=3:6
7:6=( ) :18
1:5=( ) :15
7:( )=1:3
( ):6=2:4
3:0.6=( ) :1
12:4=( ) :2
4:11=( ) :33
9:5=45:( )
3:7=( ) :49
15:6=( ) :30
答案:
25
27
9
9
1
1
0.6
12
4
10
4
21
3
21
3
5
6
12
25
21
75
27
9
9
1
1
0.6
12
4
10
4
21
3
21
3
5
6
12
25
21
75
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