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

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

一、在（）里填上合适的数。 19-( )=4 ( )-15=2

9+( )=18

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

6+( )=9 2+( )=11 7+( )=15 8+( )=13 ( )+7=12 ( )+5=11 三?括号里最大能填几? 10+5>( ) 6+3>4+( )

( )+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 6-( )=4

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 7+9>( )+7 5+9>( )+10 8+5>( ) ( )+0<8+4

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

9+4>( )+9 8+10>( )-0 6+( )<17-5 ( )+7<8+3 18-7= 10+9= 11+4= 11+7= 18-8= 12+7= 18-4= 10+7= 13+4= 13-3= 12-2= 17-5= 14+6= 19-0=

10+2=10+3=15-3=11+8=12+4=16-5=17-4=18-3=10+5=13+7= 14+2=10+8=15+1=15+4=