20以内加减法怎么教

20以内加减法怎么教

6+9= 5+8= 7+3= 6+6= 9+5= 7+9= 8+8= 5+8= 14-9= 17-6=4+7= 9+4= 6+8= 9+7= 7+8=9+8= 4+6= 5+3= 6+8= 17-5=3+7= 6+8= 9+6= 2+8= 6+9=14-6= 5+7= 4+7= 7+9= 15-8=6+9= 8+4= 9+8= 8+5= 9+11=16-7= 13-7= 7+4= 8+3= 17-6=19-8= 8+5= 9+5= 8+6= 7+14=8+2= 4+7= 3+9= 12-8= 5+8 3+5= 13-6= 6+9= 9+5= 13-8=4+6= 9+9= 8+7= 4+7= 6+3=12-9= 9-3= 8+3= 5+7= 5+6=6+8= 9+2= 7+4= 5+5= 4+9=10+6= 9+5= 10+4= 6+10= 8+5=14-6= 7+2= 6+5= 6+8= 9+6=8+5= 3+6= 8+5= 7+9= 5+7=6+8= 4+7= 5+9= 9+4= 7+8=6+5= 4+9= 5+7= 7+7= 8+4=5+3= 2+7= 6+4= 7+4= 3+6=13-6= 18-9= 11-7= 6+9= ( )+5=1217-9= 13-6= 14-5 = 15-6= 18-( )=912-9= 12+8= 11-9= 4+8= 5+( )=1416-4= 7+9= 16-7= 2+17= 11-( )=512-8= 17-8= 18-1= 17-8= 17-( )=1015-7= 10-4 = 14+6 = 16-9= 14+( )=1815+5= 16-8= 14-7 = 12+8 = ( )+8=128+6= 14-10 = 8+8= 14-9= ( )-12=37+5= 14-4= 11+9 = 11-6= ( )-8=817+1 = 15-8= 16+3= 5+8= ( )+5=189+2= 8+4= 7+5= 6+6= 5+6=15-9= 14-8= 12-7= 11-6= 13-5=9+4= 7+8= 7+7= 6+5= 5+7=12-9= 16-8= 15-7= 14-6= 11-5=9+6= 8+8= 7+6= 6+8= 5+8=16-9= 11-8= 13-7= 15-6= 12-5=9+8= 5+8= 7+4= 6+9= 5+9=13-9= 13-8= 14-7= 12-6= 14-5= 9+3= 9+8= 7+8= 6+7= 4+9=11-9= 12-8= 16-7= 13-6= 15-5=14-9= 15-8= 17-10= 12-3= 11-4=11-3= 12-4= 13-4= 11-2= 14-10=4+8= 5+7= 2+9= 7+5= 8+6=14-6= 12-5= 11-5= 13-8 15-6=7+7= 9+9= 9+6= 8+5= 8+9=11-5= 12-6= 14-9= 16-9= 15-8=4+7= 6+6= 8+8= 9+3= 7+7=14-8= 15-6= 16-9= 17-8= 18-9=9+9= 7+5= 8+6= 5+9= 13-8=17-10= 16-1= 16-2= 16-3= 16-4=1+11= 1+12= 1+13= 1+14= 1+15=20-10= 19-1= 19-2= 19-3= 19-4=18-5= 18-6= 18-7= 18-8= 18-9=17-5= 17-6= 17-7= 17-8= 17-9=6-2= 6-3= 6-4= 6-5= 6-6=16-10= 15-1= 15-2= 15-3= 15-4=2+7= 2+8= 2+9= 2+10= 2+11=15-10= 14-1= 14-2= 14-3= 14-4=1+16= 1+17= 1+18= 1+19= 2+0=19-5= 19-6= 19-7= 19-8= 19-9=2+12= 2+13= 2+14= 2+15= 2+16=15-5= 15-6= 15-7= 15-8= 15-9=18-10= 17-1= 17-2= 17-3= 17-4=2+17= 2+18= 3+3= 3+4= 3+5=19-10= 18-1= 18-2= 18-3= 18-4=3+16= 3+17= 4+4= 4+5= 4+6= 13-5= 13-6= 13-7= 13-8= 13-9=4+7= 4+8= 4+9= 4+10= 4+11=13-10= 12-1= 12-2= 12-4= 12-5=4+12= 4+13= 4+14= 4+15= 4+16=11-1= 11-2= 11-3= 11-4= 11-5= 通过训练才能掌握知识