国小一年级下册数学口算练习题

6+40=45-5=6+56=30+9=29+6=

58-50=37+5=23-20=67-60=40+9=

63-30=42-2=4+90=20+67=56+10=

23-6=20+80=51+8=37-7=57+30=

72-60=68-8=90-70=7+50=20+23=

50+28=52-50=18+30=86-40=40+47=

58-3=50+38=5+43=68-5=25+40=

96-90=48+8=58-8=55-3=52+30=

47-7=66-20=70-7=77-9=32+3=

90-40=61+5=60+30=55-8=7+33=

86-20=86-40=49+3=56+3=22+50=

25+20=7+42=17+50=30+20=100-30=

6+30=88-60=7+40=94-6=38+4=

100-70=34+4=74-70=28+6=7+64=