2016一年级数学下册速算题练习题
15-6= 12-10= 20+2=
4+16= 7+13= 15-12=
18-10= 12-9= 11+9=
16-12= 12+10= 20-10=
15-7= 10+15= 15-15=
5+20= 9+11= 20-3=
14+5= 10-6= 18+2=
20-2= 15+4= 20-5=
5+13= 12-5= 20-6=
15-3= 17-12= 20+30=
42-2= 15-10= 15+3=
18-8= 5+15= 20-9=
90+5= 10-7= 90-60=
20-9= 12+7= 13+7=
15+5= 12+3= 20-5 =
13-12= 4+12= 14-6=
5+15= 10-2= 20+70=
14+11= 60+8= 12+7=
19-16= 40+30= 17+3=
20-12= 65+5= 20-4=
