一、在()里填上合适的数。

( )+5=12
11+( )=19
20-( )=15
10+( )=20
16-( )=0
( )+7=17
( )-2=18
9+( )=17
19-( )=7
13+( )=16
( )-4=10
( )+2=11
( )-5=9
( )+7=15
6+( )=12
9+( )=15
3+( )=11
( )+8=14
17-( )=7
( )-5=10
13-( )=10
( )+6=11
10+( )=16
7+( )=15
17-( )=17
( )+12=12
13+( )=16
18-( )=9
5+( )=14
11-( )=5
17-( )=10
14+( )=18
( )+8=12
( )-12=3
( )-8=8
( )+5=18
2+( )=10
4+( )=8
5+( )=10
9+( )=18
3+( )=17
( )+6=10
( )+3=9
( )+1=20
( )+7=10
( )+9=20
13+ ( )=16
14-( )=10
12+( )=18
15-( )=11
( )+5=13
19-( )=5
( )+2=16
18-( )=4
( )+2=14
4+( )=20
19-( )=14
( )-5=13
15+( )=17
( )-15=5
19-( )=4
( )-15=2
9+( )=18
15-( )=10
( )-6=13
( )+9=19
20-( )=4
19-( )=3
( )+11=15
( )-6=12
18-( )=11
17-( )=10
( )+6=15
( )-7=11
13+( )=14
17-( )=10
( )-8=11
10+( )=17
( )+5=12
18-( )=9
5+( )=14
11-( )=5
17-( )=10
14+( )=18
( )+8=12
( )-12=3
( )-8=8
( )+5=18
12-( )=9
15-( )=7
12-( )=3
17-( )=9
( )-6=7
12-( )=5
13-( )=8
( )-7=7
14-( )=6
15-( )=9
11-( )=7
17-( )=8
( )-5=7
13-( )=7
13-( )=5
15-( )=8
12-( )=9
17-( )=7
12-( )=6
16-( )=9
( )-4=7
( )-6=5
14-( )=6
18-( )=9
6+( )=14
( )+6=14
14-( )=8
9+( )=13
( )+8=13
( )+( )=12
( )+8=15
( )-4=11
( )-9=9
( )-8=5
14-( )=6
6+( )=9
2+( )=11
7+( )=15
8+( )=13
( )+7=12
( )+5=11
( )+10=10
15-( )=15
15-( )=5
15-( )=10
15-( )=0
8+( )=16
( )+7=12
( )+5=14
16-( )=10
7+( )=14
0+( )=12
5+( )=11
( )+6=14
8-( )=0
8-( )=8
15-( )=6
( )+13=13
19-( )=9
6+( )=14
0+( )=0
13-( )=5
8+( )=15
10+( )=18
15+( )=20
0-( )=0
6+( )=14

 二、在()里填“>”、“<”或“=”。

6+4()11
6+4+2()6+6
7+8()8+2+6
17()8+8
7+3()20-3-7
4+3+5()14-2
6+7()17-7+4
12()15-3
6+7()8+6
5+8()8+5
8+5()3+9
3+2()20-4
4+6()20-9
17-3()7+7
16-5()6+6
13()7+7
20()10+9
6+7()9+2
5+8()6+9
13-3+5()9+5

 三、括号里最大能填几。

10+5>( )
6+3>4+( )
7+9>( )+7
9+4>( )+9
5+9>( )+10
8+10>( )-0
8+5>( )
6+( )<17-5
( )+0<8+4
( )+7<8+3