二年级数学上册速算练习.doc

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1、89-37=51-39=52-27=63-27=48+23=57-48=54+29=62+19=86-54=54+28=27+36=65-36=84-48=40-29=48+48=60+25=56-28=78-69=72-37=53+28=54+37=59+19=55-47=73+29=98-56=35+17=60-38=36-25=42-19=75-59=24+38=42-23=44+39=70+19=16+23=57-16=62+12=22+55=46-28=48-26=72-54=16+27=43-27=63+25=76-37=54-29=79-64=98-48=56-36=6

2、7-60=85-50=42-32=69-31=93-56=23+32=42-19=37-25=50+22=62-48=22+55=86-45=70-42=72-54=16+27=40-12=83-56=76-37=54-29=64+36=71-55=56-36=67-60=55+38=15+57=39+38=93-56=78-29=37+18=47+19=46-19=36+27=46-38=65-26=25+8=45-16=42-19=74-18=44-17=34+58=53-29=63+28=36+17=43-25=73+14=36-27=22+18=52+16=62-59=52-

3、34=82-33=67-28=84+9=29+35=45+9=58-29=47+18=47+29=76-19=46+27=56-38=75-26=45+8=35-16=42-29=74-68=64-17=24+58=53-39=43+28=56+17=63-25=73+24=56-27=22+28=27+16=62-49=62-34=62-35=52-17=91-37=36+26=81-35=77-28=84+19=39+35=35+19=68-39=47+28=67+29=84-29=26+17=66-48=85-56=72+18=45-36=72-39=78-39=74-37=7

4、4+18=83-49=83+17=46+27=53-35=63+34=64-45=32+19=53-35=63+34=64-45=32+19=63+37=64+24=53+16=82-37=47+19=55+38=40-17=79-28=54-45=71-15=61-39=85+7=72-45=46-28=72-17=68-57=96-59=43-27=76-38=42+59=56-27=79-64=75+17=60-37=86-58=85-50=48-36=60-37=52+23=23+32=53+36=46-38=35+17=76-18=42-37=75+17=86-45=55+

5、17=63-49=92-59=40-12=38-16=42+13=42-16=63-37=70-42=75-55=62-56=50+22=83-56=15+56=48-26=75-33=48+35=38+46=42-19=12+29-19=69+10-36=27+12-28=67+27-37=33-17+15=75-36+10=72-54+12=65-39-15=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

6、+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=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=85-28-

7、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=25-9-12=73-28=36+45=28-19-9=23-14-9=54-28=39-27=3+14+7=11+16-9=23-10-5=61-15=82-36=12+18-15=25-16-7=56-38=37+48=30-16-9=28-2-19=3+29=51-18