20以内退位减法（1）11-7= 13-5= 14-9= 12-8= 11-9= 12-9= 12-7= 11-3= 12-3= 16-7= 15-6= 13-9= 17-9= 14-8= 15-9= 17-8= 13-8= 12-6= 14-7= 11-6= 14-6= 11-4= 11-2= 13-4= 13-6= 12-4= 11-8= 12-5= 13-7= 14-5= 15-7= 18-9= 11-5= 15-8= 16-9= 16-8= 13-8= 12-6= 14-7= 11-6= 13-7= 14-5= 15-7= 18-9= 12-3= 16-7= 15-6= 13-9=20以内退位减法（2）12-3= 16-7= 15-6= 13-9= 14-6= 11-4= 11-2= 13-4= 13-8= 12-6= 14-7= 11-6= 11-7= 13-5= 14-9= 12-8= 13-7= 14-5= 15-7= 18-9= 11-9= 12-9= 12-7= 11-3= 13-6= 12-4= 11-8= 12-5= 17-9= 14-8= 15-9= 17-8= 11-5= 15-8= 16-9= 16-8= 13-7= 14-5= 15-7= 18-9= 11-5= 17-9= 15-9= 11-3= 14-9= 12-9= 12-7= 14-7=14-6= 11-4= 11-2= 13-4= 12-3= 16-7= 15-6= 13-9= 13-8= 12-6= 14-7= 11-6= 17-9= 14-8= 15-9= 17-8= 11-5= 15-8= 16-9= 16-8= 11-9= 12-9= 12-7= 11-3= 13-7= 14-5= 15-7= 18-9= 11-7= 13-5= 14-9= 12-8= 13-6= 12-4= 11-8= 12-5= 13-8= 12-6= 14-7= 11-6= 12-3= 16-7= 15-6= 13-9= 11-5= 15-8= 16-9= 16-8=20以内退位减法（4）11-9= 12-9= 12-7= 11-3= 14-6= 11-4= 11-2= 13-4= 11-5= 15-8= 16-9= 16-8= 13-6= 12-4= 11-8= 12-5= 17-9= 14-8= 15-9= 17-8= 13-7= 14-5= 15-7= 18-9= 12-3= 16-7= 15-6= 13-9= 13-8= 12-6= 14-7= 11-6= 11-7= 13-5= 14-9= 12-8= 11-9= 12-9= 12-7= 11-3= 13-7= 14-5= 15-7= 18-9= 13-6= 12-4= 11-8= 12-5=11-5= 15-8= 16-9= 16-8= 17-9= 14-8= 15-9= 17-8= 13-6= 12-4= 11-8= 12-5= 12-3= 16-7= 15-6= 13-9= 11-9= 12-9= 12-7= 11-3= 13-8= 12-6= 14-7= 11-6= 11-7= 13-5= 14-9= 12-8= 14-6= 11-4= 11-2= 13-4= 13-7= 14-5= 15-7= 18-9= 11-7= 13-5= 14-9= 12-8= 13-8= 12-6= 14-7= 11-6= 12-3= 16-7= 15-6= 13-9=20以内退位减法（6）17-9= 14-8= 15-9= 17-8= 11-5= 15-8= 16-9= 16-8= 13-8= 12-6= 14-7= 11-6= 11-7= 13-5= 14-9= 12-8= 14-6= 11-4= 11-2= 13-4= 13-7= 14-5= 15-7= 18-9= 12-3= 16-7= 15-6= 13-9= 11-9= 12-9= 12-7= 11-3= 13-6= 12-4= 11-8= 12-5= 12-3= 16-7= 15-6= 13-9= 14-6= 11-4= 11-2= 13-4= 13-8= 12-6= 14-7= 11-6=12-3= 16-7= 15-6= 13-9= 13-6= 12-4= 11-8= 12-5= 11-5= 15-8= 16-9= 16-8= 12-6= 13-8= 14-7= 11-6= 17-9= 14-8= 15-9= 17-8= 11-7= 13-5= 14-9= 12-8= 13-7= 14-5= 15-7= 18-9= 14-6= 11-4= 11-2= 13-4= 12-6= 13-8= 14-7= 11-6= 12-3= 16-7= 15-6= 13-9= 11-5= 15-8= 16-9= 16-8=20以内退位减法（8）12-3= 16-7= 15-6= 13-9= 13-6= 12-4= 11-8= 12-5= 13-8= 12-6= 14-7= 11-6= 11-9= 12-9= 12-7= 11-3= 17-9= 14-8= 15-9= 17-8= 11-7= 13-5= 14-9= 12-8= 13-7= 14-5= 15-7= 18-9= 14-6= 11-4= 11-2= 13-4= 11-5= 15-8= 16-9= 16-8= 14-6= 11-4= 11-2= 13-4= 13-7= 14-5= 15-7= 18-9= 11-9= 12-9= 12-7= 11-3=20以内退位减法（9）14-6= 11-4= 11-2= 13-4= 11-9= 12-9= 12-7= 11-3= 13-8= 12-6= 14-7= 11-6= 11-7= 13-5= 14-9= 12-8= 12-3= 16-7= 15-6= 13-9= 13-6= 12-4= 11-8= 12-5= 11-5= 15-8= 16-9= 16-8= 11-9= 12-9= 12-7= 11-3= 13-7= 14-5= 15-7= 18-9= 14-6= 11-4= 11-2= 13-4=20以内退位减法（10 ）12-3= 16-7= 15-6= 13-9= 11-7= 13-5= 14-9= 12-8= 13-8= 12-6= 14-7= 11-6= 11-9= 12-9= 12-7= 11-3= 14-6= 11-4= 11-2= 13-4= 11-5= 15-8= 16-9= 16-8= 13-6= 12-4= 11-8= 12-5= 17-9= 14-8= 15-9= 17-8= 11-7= 13-5= 14-9= 12-8= 13-7= 14-5= 15-7= 18-9= 11-9= 12-9= 12-7= 11-3=20以内进位加法口算（1）6+8= 9+9= 2+9= 9+4= 8+9= 3+8= 6+5= 4+8= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 5+7= 6+6= 7+7= 9+5= 9+3= 7+8= 5+9= 8+3= 6+9= 8+7= 8+4= 9+7= 7+5= 5+8= 6+7= 7+4= 8+9= 3+8= 6+5= 4+8= 6+8= 9+9= 2+9= 9+4= 20以内进位加法口算（2）6+8= 9+9= 2+9= 9+4= 5+7= 6+6= 7+7= 9+5= 8+9= 3+8= 6+5= 4+8= 9+2= 8+6= 4+7= 8+8= 9+3= 7+8= 5+9= 8+3= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 7+6= 9+8= 7+9= 4+9= 6+9= 8+7= 8+4= 9+7= 7+5= 5+8= 6+7= 7+4= 9+2= 8+6= 4+7= 8+8= 9+3= 7+8= 5+9= 8+3=20以内进位加法口算（3）9+6= 3+9= 5+6= 8+5= 7+5= 5+8= 6+7= 7+4= 6+8= 9+9= 2+9= 9+4= 9+3= 7+8= 5+9= 8+3= 6+9= 8+7= 8+4= 9+7= 8+9= 3+8= 6+5= 4+8= 5+7= 6+6= 7+7= 9+5= 9+3= 7+8= 5+9= 8+3= 6+8= 9+9= 2+9= 9+4= 9+2= 8+6= 4+7= 8+8=20以内进位加法口算（4）6+9= 8+7= 8+4= 9+7= 9+2= 8+6= 4+7= 8+8= 5+7= 6+6= 7+7= 9+5= 9+3= 7+8= 5+9= 8+3= 6+8= 9+9= 2+9= 9+4= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 7+6= 9+8= 7+9= 4+9= 8+9= 3+8= 6+5= 4+8= 9+3= 7+8= 5+9= 8+3= 7+5= 5+8= 6+7= 7+4= 6+8= 9+9= 2+9= 9+4=20以内进位加法口算（5）7+6= 9+8= 7+9= 4+9=9+3= 7+8= 5+9= 8+3= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 5+7= 6+6= 7+7= 9+5= 6+9= 8+7= 8+4= 9+7= 7+6= 9+8= 7+9= 4+9= 9+6= 3+9= 5+6= 8+5= 8+9= 3+8= 6+5= 4+8=20以内进位加法口算（6）6+8= 9+9= 2+9= 9+4= 9+2= 8+6= 4+7= 8+8= 7+6= 9+8= 7+9= 4+9= 9+3= 7+8= 5+9= 8+3= 8+7= 8+4= 6+9= 9+7= 8+9= 3+8= 6+5= 4+8= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 5+7= 6+6= 7+7= 9+5= 8+7= 8+4= 6+9= 9+7= 7+5= 5+8= 6+7= 7+4= 9+3= 7+8= 5+9= 8+3=20以内进位加法口算（7）7+6= 9+8= 7+9= 4+9=9+2= 8+6= 4+7= 8+8= 6+8= 9+9= 2+9= 9+4= 9+3= 7+8= 5+9= 8+3= 7+5= 5+8= 6+7= 7+4= 9+6= 3+9= 5+6= 8+5= 9+2= 8+6= 4+7= 8+8= 7+5= 5+8= 6+7= 7+4= 8+9= 3+8= 6+5= 4+8=20以内进位加法口算（8）9+2= 8+6= 4+7= 8+8= 6+8= 9+9= 2+9= 9+4= 7+5= 5+8= 6+7= 7+4= 9+3= 7+8= 5+9= 8+3= 7+6= 9+8= 7+9= 4+9= 6+9= 8+7= 8+4= 9+7= 5+7= 6+6= 7+7= 9+5= 8+9= 3+8= 6+5= 4+8= 9+6= 3+9= 5+6= 8+5= 7+6= 9+8= 7+9= 4+9= 9+2= 8+6= 4+7= 8+8= 6+8= 9+9= 2+9= 9+4=20以内进位加法口算（9）7+6= 9+8= 7+9= 4+9=6+8= 9+9= 2+9= 9+4=9+3= 7+8= 5+9= 8+3=7+5= 5+8= 6+7= 7+4=9+6= 3+9= 5+6= 8+5=8+9= 3+8= 6+5= 4+8=6+8= 9+9= 2+9= 9+4=9+2= 8+6= 4+7= 8+8=5+7= 6+6= 7+7= 9+5=20以内进位加法口算（10）8+9= 3+8= 6+5= 4+8=9+3= 7+8= 5+9= 8+3=7+6= 9+8= 7+9= 4+9=6+9= 8+7= 8+4= 9+7=9+2= 8+6= 4+7= 8+8=6+8= 9+9= 2+9= 9+4=7+5= 5+8= 6+7= 7+4=9+6= 3+9= 5+6= 8+5=5+7= 6+6= 7+7= 9+5=7+5= 5+8= 6+7= 7+4=6+8= 9+9= 2+9= 9+4=9+3= 7+8= 5+9= 8+3=20以内加减混合练习( 一)9+4= 15-9= 11-9= 9+5= 16-7= 11-4= 12-9= 4+7= 2+9= 16-8= 12-7= 6+7=13-9= 8+7= 7+5= 13-6= 12-4= 6+6=11-3= 12-5= 14-7= 4+7= 13-8= 9+9=11-8= 11-6= 7+5= 11-7= 13-5= 14-9=12-8= 11-2= 14-6= 13-4= 7+5= 13-7=14-5= 15-7= 18-9= 17-9= 8+4= 14-8=15-9= 7+3= 8+6= 17-8= 11-5= 16-9=15-8= 9+3= 12-7= 11-9= 15-6= 8+5=20以内加减混合练习( 二)12-4= 9+2= 14-8= 8+6= 13-7= 14-5=8+7= 11-9= 8+6= 11-3= 13-9= 11-5=16-7= 13-5= 11-5= 7+9= 8+4= 13-6= 14-6= 5+7= 12-9= 11-3= 9+8= 15-6=12-5= 8+5= 5+7= 13-5= 11-6= 8+6=8+4= 14-6= 7+6= 9+9= 18-9= 17-8=16-9= 15-7= 11-7= 5+9= 7+8= 8+4=17-8= 6+9= 18-9= 7+7= 12-9= 12-7=3+9= 6+7= 12-7= 4+8= 13-5= 12-4=14-8= 13-5= 3+8= 11-4= 7+5= 13-4=20以内加减混合练习( 三)7+5= 13-7= 14-5= 15-7= 18-9= 17-9=8+4= 14-8= 15-9= 7+3= 8+6= 17-8=11-5= 16-9= 15-8= 9+3= 12-7= 11-9=15-6= 8+5= 9+4= 15-9= 11-9= 9+5=16-7= 11-4= 12-9= 4+7= 2+9= 16-8= 12-7= 6+7= 9+7= 12-3= 9+2= 5+8=16-7= 13-9= 11-7= 8+7= 12-4= 15-6=13-7= 8+6= 14-8= 11-3= 14-5= 8+7= 8+6= 11-9= 11-5= 13-9= 16-7= 13-5=11-5= 7+9= 8+4= 14-6= 14-8= 5+7=20以内加减混合练习( 四)7+8= 8+4= 17-8= 6+9= 18-9= 7+7=12-9= 12-7= 3+9= 12-7= 6+7= 13-5=4+8= 13-4= 14-8= 3+8= 11-4= 9+8=13-5= 7+5= 13-4= 12-9= 12-6= 15-6=12-5= 8+5= 5+7= 13-5= 11-7= 8+6=8+4= 14-6= 18-9= 17-8= 7+6= 9+9=16-9= 15-7= 6+6= 5+9= 12-4= 11-7=7+5= 13-6= 11-3= 12-5= 14-7= 4+7=13-8= 9+9= 14-9= 11-8= 11-6= 11-7=7+5= 13-5= 14-6= 13-4= 12-8= 11-2=20以内加减混合练习( 五)9+2= 15-9= 8+8= 13-8= 11-3= 9+4=16-7= 6+7= 2+9= 11-5= 8+6= 11-2=9+7= 14-8= 13-9= 6+9= 12-7= 12-7=14-9= 15-8= 8+8= 18-9= 11-3= 8+4=15-7= 6+7= 13-9= 6+9= 2+9= 11-5=12-9= 15-9= 7+7= 12-5= 14-9= 16-8= 9+8= 11-2= 13-7= 9+7= 5+8= 14-8= 12-3= 12-9= 7+5= 16-9= 15-8= 13-7= 8+4= 17-8= 11-9= 12-7= 9+8= 11-4= 15-6= 11-8= 4+9= 12-6= 12-7= 12-4=20以内加减混合练习(六)6+8= 12-9= 16-9= 7+5= 15-8= 12-4= 11-9= 11-7= 9+3= 17-9= 17-8= 5+8= 15-8= 11-3= 12-7= 11-4= 9+8= 12-7= 4+9= 12-6= 4+7= 17-9= 13-7= 15-7= 9+9= 14-8= 13-5= 5+6= 7+8= 7+9= 14-6= 12-8= 8+4= 11-6= 6+6= 13-8= 12-4= 13-6= 12-5= 14-8= 15-7= 9+9= 13-7= 7+8= 8+5= 5+7= 8+4= 11-6= 4+7= 13-8= 17-9= 14-6= 12-8= 7+8= 13-6= 6+6= 8+9= 17-8= 15-9= 9+8=20以内加减混合练习(七)6+8= 12-9= 16-9= 7+5= 15-8= 12-4= 11-9= 11-7= 9+3= 17-9= 17-8= 5+8= 15-8= 11-3= 12-7= 11-4= 9+8= 12-7= 4+9= 12-6= 9+2= 15-9= 11-3= 9+4= 8+8= 13-8= 16-7= 6+7= 2+9= 11-5= 8+6= 11-2= 6+9= 13-9= 14-8= 9+7=12-7= 12-7= 14-9= 15-8= 8+8= 18-9= 11-3= 8+4= 15-7= 6+7= 13-9= 6+9= 2+9= 11-5= 12-9= 15-9= 7+7= 12-5= 14-9= 16-8= 5+8= 11-2= 13-7= 9+7= 20以内加减混合练习( 八)6+8= 12-9= 16-9= 7+5= 15-8= 12-4= 11-9= 11-7= 9+3= 9+8= 17-8= 5+8= 15-8= 11-3= 17-9= 12-7= 12-7= 11-4= 4+9= 12-6= 9+9= 15-7= 13-7= 14-8= 12-5= 5+7= 8+4= 11-6= 13-8= 17-9= 4+7= 7+8= 14-6= 12-8= 6+6= 13-6= 8+9= 17-8= 15-9= 9+8= 4+7= 17-9= 13-7= 15-7= 9+9= 14-8= 13-5= 5+6= 7+8= 7+9= 14-6= 12-8= 8+4= 11-6= 6+6= 13-6= 13-8= 8+5= 12-4= 7+8=20以内加减混合练习( 九)7+5= 13-6= 12-4= 6+6= 11-3= 12-5= 14-7= 4+7= 9+9= 13-8= 15-8= 11-6= 7+5= 11-7= 13-5= 14-9= 12-4= 10-2= 14-6= 13-4= 7+8= 8+4= 17-8= 6+9= 18-9= 7+7= 12-9= 12-7= 3+9= 6+7= 12-7= 13-5= 4+8= 13-4= 9+8= 11-4= 13-5= 7+5= 14-8= 5+8= 13-4= 14-8=12-3= 12-9= 7+5= 15-8= 16-9= 13-7= 8+4= 17-8= 11-9= 9+8= 11-4= 12-7= 4+9= 12-6= 15-6= 11-8= 12-7= 12-4=20以内加减混合练习( 十)9+4= 15-9= 11-9= 9+5= 16-7= 11-4= 12-9= 4+7= 2+9= 16-8= 12-7= 6+7= 9+7= 12-3= 15-6= 5+8= 16-7= 11-7= 13-9= 8+7= 6+8= 12-9= 16-9= 7+5= 15-8= 12-4= 11-9= 11-7= 9+3= 17-9= 17-8= 5+8= 15-8= 9+8= 11-3= 12-7= 12-7= 11-4= 4+9= 12-6= 12-4= 9+2= 14-8= 8+6= 13-7= 14-5= 8+7= 11-9= 8+6= 11-3= 15-9= 11-5= 16-7= 13-5= 11-5= 7+9= 8+4= 13-6= 14-6= 5+7=整十数加减法计算（1）30+7= 65-5= 44-4= 1+80= 84-80=74-4= 28-20= 60+7= 70-20= 60+40=70+30= 30-10= 50-20= 5+90= 46-6=10+50= 70-30= 71-1= 60+30= 30+70=100-50= 50+50= 37-30= 91-1= 93-3=6+40= 7+60= 30-0= 37-7= 100-60=76-6= 46-6= 40+50= 78-8= 54-4=8+70= 40+5= 100-70= 100-90= 6+40=8+60= 78-8= 62-10= 92-90= 69-9=80-40= 26-6= 98-8= 55-5= 70+30= 85-5= 86-80= 60+3= 100-80= 68-8= 2+30= 50+7= 80-60= 47-40= 27-7=整十数加减法计算（2）80+7= 100-40= 20+20= 10+80= 53-50= 79-9= 40+9= 6+80= 70+20= 72-2= 70+8= 30+10= 100-20= 59-9= 68-8= 55-50= 73-3= 70+6= 50+20= 30+40= 60+8= 8+20= 30+20= 9+20= 80+10= 80+8= 76-70= 30+6= 50+3= 0+100= 70+30= 46-6= 9+90= 100-100= 86-6= 7+70= 30+50= 10+70= 8+90= 70+8= 60-20= 80+10= 61-60= 52-50= 35-35= 55-5= 100-30= 86-6= 80-50= 38-8= 77-7= 40+30= 7+90= 36-6= 60-30= 50+50= 84-4= 30+60= 90-70= 80+9=整十数加减法计算（3）2+30= 50+7= 80-60= 47-7= 27-20= 4+80= 28-8= 60+7= 70-20= 60+40= 10+50= 70-30= 71-1= 60+30= 30+70= 76-6= 46-40= 40+50= 78-8= 54-5= 39-9= 65-5= 44-4= 1+80= 84-4=70+30= 30-10= 50-20= 5+90= 46-6= 100-50= 50+50= 37-7= 91-1= 93-3=50+2= 7+60= 30-10= 37-7= 100-60= 97-7= 40+5= 100-70= 100-90= 6+40=85-80= 86-6= 60+3= 100-80= 68-60= 8+60= 78-8= 61-0= 92-2= 69-9= 80-40= 26-6= 98-8= 55-5= 70+30=整十数加减法计算（4）60-20= 80+10= 91-90= 52-0= 35-35= 100-60= 74-70= 8+60= 70-50= 67-7= 60+8= 8+20= 30+20= 91+9= 80+10= 80+8= 76-6= 30+6= 50+3= 40+60= 79-9= 40+9= 6+80= 70+20= 72-70= 70+30= 46-6= 9+90= 100-100= 86-6= 7+70= 30+50= 10+70= 8+90= 70+8= 45-40= 100-30= 86-80= 80-50= 38-30= 77-70= 40+30= 7+90= 36-6= 60-30= 70+8= 30+10= 100-20= 59-50= 68-8= 55-5= 73-3= 70+1= 50+20= 30+40= 50+50= 84-4= 30+60= 90-70= 80+9=整十数加减法计算（5）95-5= 73-70= 70+1= 50+20= 3+40= 80-40= 26-6= 98-8= 55-5= 70+30= 76-6= 46-6= 40+50= 78-8= 54-4= 39-9= 65-5= 44-40= 1+80= 87-80= 74-4= 28-8= 60+7= 70-20= 60+40= 35-5= 100-30= 86-6= 80-50= 88-8= 6+40= 7+60= 30-10= 37-30= 100-60= 60+8= 8+20= 30+20= 9+20= 80+10= 7+70= 30+50= 10+70= 8+90= 7+80= 100-70= 73-3= 8+60= 70-50= 72-2=80+7= 100-40= 20+20= 10+80= 53-3=40+6= 75-5= 85-5= 3+90= 74-4= 17-7=60-60= 97-7= 8+60= 70-50= 97-7=整十数加减法计算（6）80+6= 100-40= 20+20= 10+80= 53-50=79-9= 40+9= 6+80= 70+20= 72-2=70+8= 30+10= 100-20= 59-9= 68-8=55-50= 73-3= 70+6= 50+20= 30+40=60+8= 8+20= 30+20= 9+20= 80+10=80+8= 76-70= 30+6= 50+3= 20+7=70+30= 46-40= 9+90= 100-100= 86-6=7+70= 30+50= 10+70= 8+90= 70+8=60-20= 80+10= 61-60= 52-50= 35-30=55-5= 100-30= 86-6= 80-50= 38-8=77-7= 40+30= 7+90= 36-6= 60-30=50+50= 84-4= 30+60= 90-70= 80+9=4+70= 69-9= 90+2= 10+40= 59-9= 24-20= 73-3= 90+8= 30+7= 50+30= 98-8= 40+9= 20+6= 50+6= 61-60= 90+1= 45-5= 83-3= 78-8= 50+50= 23-3= 91-90= 5+50= 40+50= 98-90= 60+1= 4+30= 90-50= 60+9= 60+5= 80+7= 10+30= 32-30= 67-7= 10+2= 50+4= 60+3= 90+1= 78-70= 45-5= 89-9= 91-1= 88-8= 3+30= 4+40= 77-7= 20+3= 50+6= 60+40= 51-1= 14-4= 90+6= 41-1= 36-6=整十数加减法（8）5+60= 50+6= 16-6= 92-2= 70-60= 37-7= 30+1= 3+70= 85-5= 2+50= 37-30= 97-90= 39-9= 90+10= 70+30= 55-50= 90+1= 80+6= 20+80= 50+5= 50+7= 99-90= 2+40= 40+50= 38-8= 60-50= 80+3= 10+90= 57-7= 95-5= 40+60= 70+20= 83-3= 30+7= 72-2= 15-5= 70+7= 20+80= 22-20= 20+3= 70+8= 44-40= 84-4= 65-5= 30+8= 10+1= 65-5= 51-1= 12-2= 90+2= 60+7= 4+40= 90+2= 70+9= 50+5= 59-9= 91-1= 90+4= 48-8= 3+20=整十数加减法（7）整十数加减法（9）52-2= 90+10= 20+9= 4+30= 30+9= 75-70= 36-6= 70+1= 10+4= 90+1= 47-7= 69-9= 76-70= 2+20= 4+30= 89-9= 73-3= 98-90= 20+30= 60+7= 90+1= 70-50= 20+6= 56-6= 60+40= 70+30= 99-9= 57-50= 70+8= 50+5= 40+7= 82-80= 25-20= 20+50= 88-80= 60+1= 80+9= 40+60= 57-7= 87-80= 7+60= 10+3= 67-7= 3+40= 40+50= 90-60= 20+3= 80+20= 91-1= 66-6= 77-7= 52-2= 98-8= 2+60= 20+8= 80+5= 90+6= 80+2= 3+50= 41-40=整十数加减法（10）15-5= 70+1= 80+20= 90-20= 30+1= 3+90= 87-80= 34-4= 56-50= 3+30= 39-9= 90+10= 32-2= 88-80= 90-90= 20+7= 10-3= 5+40= 30+5= 93-3= 10+3= 66-6= 30-7= 57-7= 50+9= 90-60= 2+40= 10+80= 40+60= 60+40= 4+50= 22-2= 26-6= 45-5= 60+7= 70+8= 30+70= 90-30= 5+40= 90+4= 74-70= 65-60= 60+9= 83-3= 40+50= 90-30= 10-2= 90+2= 20+6= 80+10= 90+4= 80+1= 50+5= 49-9= 70+6= 86-6= 93-3= 50+1= 10+70= 50+8=整十数加减法（11）70+4= 10+80= 17-7= 96-6= 50+2= 60+3=80+1= 90+3= 35-5= 10-3= 60+8= 70+9= 10+6= 30+2= 40+9= 40+9= 94-4= 90-50= 59-9= 80+9= 83-3= 83-3= 30+7= 4+80= 12-2= 80+8= 40+5= 40+5= 20+9= 71-1= 30+2= 10-4= 60+5= 50+4= 90-30= 92-2= 21-1= 46-6= 50+4= 40+3= 90-80= 30+9= 66-6= 30+4= 99-9= 39-9= 40+5= 56-50= 22-2= 66-6= 50+50= 50+5= 61-1= 2+70= 90+3= 80+5= 36-6= 35-5= 20+80= 90+2=整十数加减法（12）60+3= 34-4= 90+6= 90+6= 47-7= 6+20= 46-6= 88-8= 70+9= 70+9= 60-50= 100-80= 60+2= 28-20= 95-5= 96-6= 50+9= 60+1= 70+2= 75-5= 50+9= 15-5= 66-60= 70+1= 10+60= 10+80= 80+8= 30+40= 80+8= 70+30= 2+60= 90-80= 60+5= 41-1= 90+6= 10+7= 40+60= 35-5= 24-20= 70+8= 64-4= 45-5= 89-9= 83-80= 60+7= 22-2= 60+7= 70+8= 42-40= 83-3= 20+9= 74-4= 30+9= 41-40= 80-50= 70+9= 68-8= 20+4= 79-9= 81-1=。