2015一年級(jí)下冊數(shù)學(xué)口算練習(xí)題

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    72-2= 45+9= 86-8= 96-2= 24+9=
    40-2= 46-9= 43+4= 18-2= 38-8=
    35+5= 85+2= 59-4= 78+10= 82-5=
    64+6= 32+7= 49+5= 63+3= 84-2=
    60-4= 11+20= 45-30= 30+8= 60-7=
    25+40= 36-5= 84+4= 52-3= 71+9=
    88+4= 76+0= 93-3= 18+5= 70-5=
    56+20= 64+6= 65+30= 75-30= 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=
    52+2-7= 53-(44+6)= 47+(10-8)= 53-50+47= 64+(30-30)=
    29-20+9= 20+(55-20)= 4+66+30= 54+8-30= 6+20+30=
    68-(38-30)= 9+28+20= 50-3+50= 60-(30+20)= 9+51-40=
    9+(65-30)= 8+77+20= 41-41+10= 50+(43-30)= 21-3+8=