1 三年级数学笔算加法练习450+68 =589+225 =800 -799 =553-77 =706+395 =215+89 =725-304 =357-243 =420+125 =585+309 =205 -169 =343-256 =700+169 =511+479 =420 -359 =738-117 =125+394 =320+135 =382 -138 =451 -254 =2 469+306 =714+180 =169-79 =437-65 =423+198=465+72=725 - 433 =211-175 =296+197 =864+89 =237-169 =293-189 =218+132 =245+393 =900 -888 =329-155 =500+389 =68+368 =540 -181 =333-207 =3 241+496 =201+184 =649 -582 =1001 -795 =550+394 =120+85 =534-129 =172-89 =384+89 =212+433 =896 -375 =139-99 =478+149 =394+226 =151-83 =162-85 =4 175+105 =246+108 =768 - 74 =432-145=600+456 =226+425 =305 - 48 =355-155=388+148 =705+139 =479 -246 =713 -504=139+95 =141+259 =123-37 =291-195= 125+304= 247+26= 197 -35= 362 -138= 5 481+254= 470+230= 608-157= 293-46= 340+281= 185+427= 634 -270= 205-148= 789+196= 135+107= 700 -282=