,写一写,百,十,个,百,十,个,读一读,5,2,五十二,2,5,二十五,百,十,个,百,十,个,拨一拨,5,3,0,0,1,参观世博,二()班人,二()班人,二()班人,二()班人,准乘人,准乘70人,32+4= 58+30=,3 2 4,+,( ),5 8 3 0,( ),+,练一练,6,3,36,8,8,88,+,( ),( ),( ),3,5,2,4,5,9,70,72,88,77,99,65,数学医院,53+4= 40+26=,5 3,+,( ),4 0 2 6,( ),+,3,9,93,6,6,4,