小學(xué)二年級(jí)數(shù)學(xué)下冊(cè)練習(xí)題:口算練習(xí)2
時(shí)間:2011-05-04 20:46:00 來源:互聯(lián)網(wǎng) [字體:小 中 大]
79-4= 50+30= 90-70= 54+4=
77-6= 50+32= 40+6= 57-20=
15-8= 40+32= 11-9= 95-90=
6+32= 50+43= 70+30= 86-6=
12-5= 6+9= 19-2= 57-30=
64+3= 4+32= 73+3= 67-40=
5+61= 42+7= 12-9= 50+21=
12-5= 50+40= 13-4= 16-8=
11-3= 25-20= 98-8= 47-30=
77-6= 50+32= 40+6= 57-20=
15-8= 40+32= 11-9= 95-90=
6+32= 50+43= 70+30= 86-6=
12-5= 6+9= 19-2= 57-30=
64+3= 4+32= 73+3= 67-40=
5+61= 42+7= 12-9= 50+21=
12-5= 50+40= 13-4= 16-8=
11-3= 25-20= 98-8= 47-30=