一年级数学难易度均有口算题

12+6=29-7=33+2=3+40=15+4=

23+5=37+1=29-3=38-3=15-4=

18-2=30+8=43+1=86+2=70+3=

30-2=72-2=66-4=39-2=20-9=

53+5=35+2=39-4=8+50=20-1=

40+6=62+7=89-5=63+3=34-2=

50-4=11+2=53-3=60+8=80-7=

32+4=26-5=84+4=35-10=71+9=

18-4=66+10=83-3=71+5=60-5=

36+3=58+30=28-7=87-10=80-6=

11+9=80-3=95-4=64+3=98-4=

25+7=62-2=83+5=83+10=10+8=

56+20=64+6=65+3=15-3=30-3=

32+6=29-7=35+2=73+4=25+4=

43+5=87+10=39-3=48-30=95-40=

81-2=60+8=39+10=76+10=70+30=

48-9=47-8=52-4=43-8=68-9=

40-2=27-9=32-4=41-2=38-9=

50-8=63-9=37-8=56-20=88-9=