整十数加一位数、整十数,4,50,说出下列各数的分成,8,6,口算,30+6= 5+20=30+60= 50+20=,36,25,90,70,20,34,2,342,6,6,36,3420,50,50,54,3420,50,50,54,342,36,6,6,39,75,45,72,26,71,20+40=,5+30=,16+3=,32+20=,60,53,29,34,24,35,52,19,48,79,89,给小鸟找家,74,95,71+8,44+30,20+69,25+70,6+42,20+3,23,25+3,28,76+3,79,2+30,32,20+30,50,69+30,99,今天你学会了什么？,
