脱式计算.168.1÷(4.3×2﹣0.4);10.6﹣(6.6+0.125÷12.5%);;.
计算(1)3+5+2= (2)4+5+2= (3)12-3-7= (4)5+5+6=(5)12-8-1= (6)10-2-3= (7)5+4+2= (8)14-6-8=(9)2+7+6= (10)9-9+6= (11)13-4-7= (12)11-2-3=(13)14-3-10= (14)3+5+7= (15)3+4+6= (16)12-4-4=(17)7+1+7= (18)16-8-8= (19)16-9-3= (20)10-8-0=
口算(1)8+6= (2)9+9= (3)15-6= (4)8+6=(5)9-5= (6)7+8= (7)13-8= (8)12-8=(9)17-8= (10)13-5= (11)6-3= (12)11-2= (13)14-5= (14)11-3= (15)13-10= (16)12-9=(17)12-3= (18)15-7= (19)12-6= (20)14-3=
计算.5+1+3= 5-3+6=9-6-2= 9-6+7=9-7-2= 6+3-7=7+2-5= 2+5-4=8-3-0= 4-2+5=9-8-1= 10-4+l=
计算下面各题.2+5= 9-4= 7+3=6-4= 2+2= 6-6=1+5= 7-5= 8-7=2+8= 4+5= 9-6=8-4= 8-2= 8+1=4+6= 10-9= 10-4=
口算.5+4= 5-3= 3+0=8+7= 9+7= 7-7=3+5= 10-4= 9-8=7-2= 7-6= 3+7=10-6= 9-6= 9-5=5-4= 8-3= 5+2=