2.第二课时 习题课
人教版 数学 一年级 上册,习题课,第4课时 习题课,算一算,65=,4,1,10,11,2+1= 2+2= 2+3= 2+4= 2+5= 2+6=,2+ 7 = 2+ 8 = 2+ 9 = 2+10= 2+11= 2+12=,9 10 11 12 13 14,3 4 5 6 7 8,15,13,15,12,12,13,10,11,14,5,2,3,14,14,+,+,9,5,9,5,6,8,6,8,15,+,8,7,9+6=15(只),12,12,+,+,6,6,7,5,计算小数加大数时,有以下几种方法: 1.将小数拆开,与大数凑十,转化为十加几进行计算。 2.将大数拆开,与小数凑十,转化为十加几进行计算。,9+2=,8+2=,6+4=,11,2+9=,2+8=,4+6=,11,10,10,10,10,12,13,10,11,13,12,10,12,12,13,+,+,5,7,4,9,14,12,11,11,2,9,3,8,4,7,5,6,