三上口算练习2.ppt
113=,123=,133=,211=,212=,213=,214=,222=,332=,244=,422=,213=,123=,142=,412=,331=,313=,242=,422=,323=,233=,232=,412=,142=,332=,3+22=,322=,323=,想:3 ( ) =( ) 3 ( ) =( ) ( )+( )=( ),651=,想:6 ( ) =( ) 6 ( ) =( ) ( )+( )=( ),125=,想:( ) 5 =( ) ( ) 5 =( ) ( )+( )=( ),145=,想:( ) 5 =( ) ( ) 5 =( ) ( )+( )=( ),165=,想:( ) 5 =( ) ( ) 5 =( ) ( )+( )=( ),185=,想:( ) 5 =( ) ( ) 5 =( ) ( )+( )=( ),254=,想:( ) 4 =( ) ( ) 4 =( ) ( )+( )=( ),245=,想:( ) 5 =( ) ( ) 5 =( ) ( )+( )=( ),219=,319=,128=,280=,195=,619=,262=,324=,813=,541=,525=,516=,605=,62+5=,333=,256=,265=,174=,274=,623=,445=,712=,186=,999=,