1、
一年级口算
32-20= 56+30= 15+64= 53-30= 83-30=
61-40= 58+31= 45+32= 84-40= 92-40=
11+23= 95-50= 34+40= 17-10= 65+31=
12+80= 41+2= 69-3= 20+43= 20+78=
85-40= 12+72= 95-60= 67+20= 82-7=
2、
51-50= 44-30= 20-10= 91+7= 25+55=
38+25= 50+43= 70-10= 36-10= 45+50=
76-60= 25+34= 28+60= 70-50= 64+33=
81+3= 6+48= 52-40= 36-3= 29+50=
45+42= 93-40= 60-40= 46-10= 35+35=
63-9= 37-2
3、0= 31+60= 13+41= 25+50=
96-22= 52-24 = 68-60= 76-7= 28+32=
42+7= 12+86= 19+81= 70-60= 45+25=
19+27= 93-30= 70-40= 80-60= 35+32=
96-30= 52+39= 94-80= 38-5= 50+28=
67-50= 15+75=
4、48-10= 32+27= 45+45=
4+6+9= 18-10+12= 9+1+8= 18-4+9= 15-10+9= 18+2-9= 7+7-8= 10+7-9=
20-16+6= 19-6-3= 15-4+6= 5+8+3=
12+1+2= 5+7+2= 14-8+4= 16-10-3=
20-9+8= 8+8-10= 8+9-1= 10+4-14=