一年级数学下册20以内加减法连减口算题

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

，一年级数学下册20以内加减法连减口算题