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