两位数减两位数口算,2,我比小明少24枚。,我有56枚邮票。,我比小明少27枚。,(1)小芳有多少枚邮票?,(2)小宁有多少枚邮票?,5624(),5627(),2,(1)小芳有多少枚邮票?,5624(),你能口算出得数吗?和同学说说是怎样算的。,答:小芳有枚邮票。,502030,642,30232,562036,36432,32,32,枚,2,(2)小宁有多少枚邮票?,5627(),29,枚,402020,1679,20929,562036,36729,答:小宁有枚邮票。,29,2,上面两题在口算时有什么不同?,1.,5730,272,5732,27,25,25,7660,168,7668,16,8,8,4020,203,4023,20,17,17,2.,52,46,23,26,40,36,3.先说说得数各是几十多,再口算。,6735,7253,32,19,9438,8416,56,68,3126,8045,57,35,三十多,一十多,五十多,六十多,