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1、二年级上册数学口算练习题54-45=35+27=84-48=40-29=48+48=60+25=72-45=46-38=56-28=78-69=72-37=53+28=96-59=75+17=54+37=59+19=55-47=73+29=56-27=92+59=98-56=35+17=60-38=36-25=86-58=42-16=42-19=75-59=24+38=42-23=52+23=63-37=44+39=70+19=16+23=57-16=12+29-19=69+10-36=27+12-28=67+27-37= 33-17+15=75-36+10=72-54+12=65-39-15
2、= 62-18+24=54+21+18=53-29+19=35+12-28=86-12-15=57-33+31=36-27+9=77-19-16= 88-34+18=85-36+27=12+79-62=51-27+28= 51-42+53=77-65-6=71-52+36=75-24+26=75+24-23=32+45-38=81-45+36=24-16+40= 63+12-42=53-37+15=63-23+28=48-26+18=35+17=50+22=62+12=22+55=46-28=48-26=86-45=70-42=72-54=16+27=43-27=63+25=40-12=83-
3、56=76-37=54-29=79-64=98-48=64+24=75-55=56-36=67-60=85-50=42-32=55+38=15+56=69-31=93-56=23+32=42-19=71-15=62-56=17-25=50+22=62-48=22+55=46-28=48-26=86-45=70-42=72-54=16+27=43-27=75-33=40-12=83-56=76-37=54-29=79-64=48+35=64+36=71-55=56-36=67-60=85-50=38+46=55+38=15+57=39+38=93-56=23+32=42-19=15+26=56+28= 21+82-60=36+34-14=73+12-71=21+82-60= 44-5+12= 100-76+22=72-45+32=54-21-18= 67-47+22=21+82+17=83-27+10=54+21-18=65-33-18=68-65-3= 54-52+17=88-51-24= 76-63+1= 63+18+11=65+15-47=77-34+55= 43-29+13=35-28-28=77-38+42=60-34+35=17+27-10=55+38-15=54-41+36=99-88+77= 75+15-30=92-6+11=42-37+54=77-64+22=