一年级数学下册口算专项训练29-17=3+40=15+34=23+5=37+3=38-3=50-14=71+9=66+10=80-26=87-10=11+19=80-53=95-54=25+27=39-33=48-30=95-40=81-72=60+18=92-3=42-7=71-6=58-10=47-8=24-9=40-2=46-9=43-4=18-2=52-3=71+9=88-4=76+0=93-3=43-8=68-9=40-2=27-9=32-4=80-7=26-5=84+4=35-10=29-7=30-2=72-2=66-4=39-2=20-9=81-2=60+8=39+10=76+10=70+30=39+1=37+4=78+3=27+6=39+8=39+9=56+8=35+6=58+3=84+7=一年级数学下册笔算练习76+24=70+30=48+19=47-28=52-34=68-49=40-22=27+19=32-24=41-12=50-38=63+19=37-28=56-20=88-19=