一年级数学口算模拟习题

45+30=45+3=5+41=50+41=6+32=

52+6=40+47=62+4=27+40=5+23=

71+5=45+30=69+1=6+33=18+70=

44+3=5+32=25+4=20+35=4+75=

3+95=30+65=53+20=85+3=4+52=

30+65=6+22=16+3=40+58=56-30=

56-3=89-40=89-4=75-30=56-3=

29-4=77-7=29-20=56-4=63-50=

38-4=98-3=96-30=39-6=

25-4= 78-40=80-30=79-60=

49-7= 26-3= 59-3= 67-3=

99-50= 30-1= 55-2= 27-5=

45-20= 76-40= 46-30= 46+30=

4+74= 51+7= 38+40= 93-80=

63-30= 95-5= 86+10= 2+82=

69+0= 73-40= 100-30= 59-4=