苏教版一年级上册数学5以内的减法课件.ppt

5以内的减法,2,1,4,1,1,2,5,-,2,=,3,减号,等号,5,-,2,=,3,减号,等号,读作：5减2等于3。,鱼 ! !,31 = 2,32 = 1,3 3 =0,3 - 1 = 2,5 - 1 =,- =,2,2,4,4,想想做做,1.,1,1,4 - 3 =,5 - 4 =,2.先画线，再填得数。,5 - 3 =,2,1,3,2 - 1 =,4 - 1 =,3.想一想，填一填。,3 - 2 =,1,4,2,3,5,3,2,4.,6.,作业,