珠心算万以内的加法进位加.ppt

,小耳朵准备，听数布数。,8 2 1 1 8 7 5,3 4 7 2 6 9 0 5 8 1 9 6 4 2 8,全盘练,隔档拨入753,加4,加105,隔档拨入893,单档练,539,587,4594,2896,空拨,要求：第一个数实拨，第二个数空拨,459,759,1999,要求：两个加数都空拨,455,919,854,看心算,769,188,2684,252+163=,415(本),观察指法,268+179=,试一试,268+179=,447,252+163=415,比较：,268+179=447,1436+758=,试一试,2194,252+163=415,268+179=447,1436+758=2194,345+293,628+297,483+659,509+59,875+47,67+258,2128+64,2745+186,5604+557,.,.,=638,=925,=1142,=568,=922,=325,=2192,=2931,=6161,493+300493+46493+346,2165+972165+9072165+970,71+1971+10971+190,=793,=539,=839,=2262,=3072,=3135,=90,=180,=261,5+,408,294,726,317,650,+21,650,317,726,294,408,+59=,+85=,+78=,+44=,+36=,+68=,+82=,+76=,画一画,